Here, are the list of best harem shows as below: 異世界召喚は二度目です, 女神のカフェテラス, 勇者が死んだ！, 異世界でチート能力を手にした俺は、現実世界をも無双する ～レベルアップは人生を変えた～, 神無き世界のカミサマ活動, 公子不可求, 異世界のんびり農家, スパイ教室, 恋愛フロップス, 不徳のギルド, 陰の実力者になりたくて！, 異世界迷宮でハーレムを, 史上最強の大魔王、村人Aに転生する, 乙女ゲー世界はモブに厳しい世界です, ハレ婚。, 失格紋の最強賢者, 巨乳エルフ母娘催眠, 冰火魔厨, 嘉南传, 終末のハーレム, マブラヴ オルタネイティヴ, 世界最高の暗殺者、異世界貴族に転生する, 進化の実～知らないうちに勝ち組人生～, がんばれ同期ちゃん, 女神寮の寮母くん。, 月が導く異世界道中, 精霊幻想記, 現実主義勇者の王国再建記, 两不疑, 小女霓裳, .
There was once a man who was summoned to another world, and saved it. Of course, he became too popular there, and turned into an isekai-normie. However, that man fell into a "trap" and was forcibly returned to his original world. Moreover, he had to start over as a baby! This is the story of the way-too-fantastic ex-hero who lived as a gloomy high-schooler, as he gets summoned once again to that same other world in a very unexpected development!
After inheriting his late grandmother’s failing café, Hayato sees it as a bother and plans to sell it for a quick buck. Until he discovers five beautiful girls staying there! When they beg him to keep the café open, Hayato reluctantly gives in. Can he manage the seaside shop while learning to live with these unruly women?
OTT Platforms for 女神のカフェテラス are Hulu, Amazon Prime Video
Touka is just your average (slightly perverted) farmer in the village of Cheza. While he daydreams about being a hero and getting the girl, the real hero, Sion, is out battling demons that threaten to invade the world! But one day, Touka accidentally kills the hero…?! With the Legendary Hero dead, who's going to save the world now?! Touka quickly buries Sion's body to hide the evidence, but wakes up the next day to discover he is no longer in his own body…!!
OTT Platforms for 勇者が死んだ！ are Hulu, Amazon Prime Video
A door to another world stretches out before a boy who's been brutally bullied all his life. This alternate reality grants him access to all sorts of things, like cheat skills and a portal that lets him travel between his old and new worlds! Can this class loser turn his life around back home...?
OTT Platforms for 異世界でチート能力を手にした俺は、現実世界をも無双する ～レベルアップは人生を変えた～ are Netflix, Hulu, Amazon Prime Video, and Netflix basic with Ads
Yukito, the son of a questionable cult leader, lost his life due to the cult's ridiculous training practices. Now to his surprise, he was reincarnated into another world! It was an ideal world for him without the concept of "God" or "religion" BUT...! A unique "reincarnating in other world" adventure begins: creating a "religion" in a world without God?!
OTT Platforms for 神無き世界のカミサマ活動 are Hulu, Amazon Prime Video
After Hiraku dies of a serious illness, God brings him back to life, gives his health and youth back, and sends him to a fantasy world of his choice. In order to enjoy his second shot, God bestows upon him the almighty farming tool! Watch as Hiraku digs, chops, and ploughs in another world in this laidback farming fantasy!
OTT Platforms for 異世界のんびり農家 are Amazon Prime Video
Spy-in-training Lily is desperate to score a passing grade. Eager to prove herself, she leaps at the chance to join the mysterious team Lamplight and beat the Impossible Mission. Too bad the task ahead is even more harrowing than she imagined…
OTT Platforms for スパイ教室 are Netflix, Hulu, Disney Plus, U-NEXT, Amazon Prime Video, and Netflix basic with Ads
Asahi Kashiwagi lives the typical life of an average high school student — until the day a TV fortune teller’s predictions come true one after another, culminating in a series of risqué encounters! Destiny seemingly draws five beautiful girls into Asahi’s path, and soon he finds himself fielding not one, not two, but five love confessions. Asahi will need to follow his heart to find the perfect love for him, or else his love fortunes may end in one epic flail and flop.
OTT Platforms for 恋愛フロップス are Hulu, U-NEXT, and Amazon Prime Video
The skilled hunter Kikuru Madan has decided to retire out of fear of wasting his youth. One day, a guild staff member suggests that he go on a quest with a new female martial artist named Hitamu Kyan. However, she keeps getting hit by monsters one after another.
Shadowbrokers are those who go unnoticed, posing as unremarkable people, when in truth, they control everything from behind the scenes. Sid wants to be someone just like that more than anything, and something as insignificant as boring reality isn’t going to get in his way! He trains in secret every single night, preparing for his eventual rise to power—only to denied his destiny by a run-of-the-mill (yet deadly) traffic accident. But when he wakes up in a another world and suddenly finds himself at the head of an actual secret organization doing battle with evil in the shadows, he’ll finally get a chance to act out all of his delusional fantasies!
OTT Platforms for 陰の実力者になりたくて！ are Netflix, Hulu, Disney Plus, U-NEXT, Amazon Prime Video, and Netflix basic with Ads
High school student Michio Kaga was wandering aimlessly through life and the Internet, when he finds himself transported from a shady website to a fantasy world — reborn as a strong man who can use "cheat" powers. He uses his powers to become an adventurer, earn money, and get the right to claim girls that have idol-level beauty to form his very own harem.
OTT Platforms for 異世界迷宮でハーレムを are U-NEXT, Amazon Prime Video
In his past life, he was known as Demon Lord Varvatos, an all-powerful magic user and ruler. But he was lonely after the loss of his friends and loved ones during his rise to power, so in his dying moments, Varvatos cast a reincarnation spell so that he'd get a second chance at just being a normal guy. At first it looks like that's going to work – he's reborn thousands of years later as villager Ard. Unfortunately for him, his memories are still intact and he's not aware just how much has been lost over the time he spent not existing, and it looks like that's going to cost him his normal life.
OTT Platforms for 史上最強の大魔王、村人Aに転生する are Netflix, Hulu, U-NEXT, Amazon Prime Video, and Netflix basic with Ads
An ordinary office worker is reincarnated as Leon into a particularly punishing dating sim video game, where women reign supreme and only beautiful men have a seat at the table. But Leon has a secret weapon: he remembers everything from his past life, which includes a complete playthrough of the very game in which he is now trapped. Watch Leon spark a revolution to change this new world in order to fulfill his ultimate desire...of living a quiet, easy life in the countryside!
OTT Platforms for 乙女ゲー世界はモブに厳しい世界です are Hulu, Disney Plus, U-NEXT, and Amazon Prime Video
All the men she has dated while living in Tokyo have been married. Tired of love and life in Tokyo, Koharu Maezono (Haruka Shimazaki) returns to her hometown. There, she learns that her father has fallen ill and the coffee shop Lupin, which her parents run, has been forced to close due to massive debts!
His strength limited by the magical crest with which he was born, Mathias, the world's most powerful sage, decides reincarnation is necessary to become the strongest of all. Upon his rebirth as a young boy, Mathias is thrilled to discover he's been born with the optimal crest for magical combat on his first try! Unfortunately, the world he's been born into has abysmally poor standards when it comes to magic, and everyone thinks he's still marked for failure! Now it's up to Mathias to prove everyone wrong…world's strongest sage-style!
OTT Platforms for 失格紋の最強賢者 are Netflix, Disney Plus, Amazon Prime Video, and U-NEXT
In the kingdom where the elves live, there is a strictly controlled law of breeding. However, that rule is brought down by a human man named Ingwill. All the elves in the city; the Dark Elves, the Queen's knights; the High Elf Queen, who rules the land; the queen's daughter, the noble princess—All of them are made aware of their true nature through "hypnosis."
Nian Bing is the son of a fire mage and an ice mage. After both of his parents were killed by the Ice Lord, Nian Bing received both of his parents' magic gems. When Nian Bing was trying to escape from the Ice Lord's followers, he managed to cast both fire and ice magic at the same time. An impossible feat for a mage. He fell from the cliff, unconscious, and was saved by an oldman. After he woke up, the oldman gave him a food so delicious he never tasted before. It turned out that the oldman was a genius chef, once called a spirit chef. And he wants Nian Bing to be his disciple no matter what! Is Nian Bing able to seek vengeance while aiming to become the greatest chef?
Story of how Jiang Baoning uses her capability to balance the different forces in the imperial court, and together with her husband Li Qian, helps the young Emperor stabilize the court and create a peaceful golden era. Adapted from novel of the same name by Zhi Zhi.
The Man-Killer Virus: a lethal disease that has eradicated 99.9% of the world's male population. Mizuhara Reito has been in cryogenic sleep for the past five years, leaving behind Tachibana Erisa, the girl of his dreams. When Reito awakens from the deep freeze, he emerges into a sex-crazed new world where he himself is the planet's most precious resource. Reito and four other male studs are given lives of luxury and one simple mission: repopulate the world by impregnating as many women as possible! All Reito wants, however, is to find his beloved Erisa who went missing three years ago. Can Reito resist temptation and find his one true love?
OTT Platforms for 終末のハーレム are Amazon Prime Video, U-NEXT
A story of the bonds between those who fight, in a world pushed to its limits. On one of the countless parallel worlds that exist throughout spacetime, humanity has fought a decades long war against the BETA, hostile extraterrestrial invaders, using humanoid fighting machines called Tactical Surface Fighters. This is a story of how humanity lives and dies while on the brink of extinction...
The world's number one assassin has been reincarnated as the eldest son of a family of aristocrat assassins. In exchange for being reincarnated in another world, a goddess has imposed upon him one condition. "Kill the Hero who is prophesied to destroy the world." This was to be the mission in his new life. The synergistic effect of the vast knowledge and experience he gained that made all manner of assassinations possible in the modern world, and the secret techniques and magic of the fantasy world's most powerful family of assassins turn him into the greatest assassin of all time.
OTT Platforms for 世界最高の暗殺者、異世界貴族に転生する are Netflix, Amazon Prime Video, Disney Plus, and U-NEXT
High school student Hiiragi Seiichi is bullied by his classmates for being a "loser." One day, his entire school is suddenly transported to a video game-like world of swords and sorcery. When he accidentally eats "the Fruit of Evolution," his life as a successful "winner" begins.
Douki-chan is an office lady who is working with Douki-kun in an office. Unbeknownst to Douki-kun, Douki-chan secretly has feelings for him. As Douki-chan struggles to confess her feelings, her rivals, both the kouhai and senpai, continue to vie for his affection.
Down-on-his-luck Koushi Nagumo wanders the streets unemployed, homeless and in search of his next meal. His fortunes improve after a chance meeting with a vivacious young woman whose proposition seemingly solves nearly all his problems. Thanks to her, Koushi enters the welcoming halls of a dormitory at a women’s college… only this particular assignment is no stuffy, sleepy affair. The Goddess’ Dormitory is known for housing the college’s most unruly students! If he wants to keep a roof over his head, Koushi must become the “Dormitory Mother” charged with maintaining order and good discipline. But doing his job and keeping his sanity are no small feat with characters as endearingly eccentric and untamable as these!
OTT Platforms for 女神寮の寮母くん。 are U-NEXT
Makoto Misumi is just an ordinary high school student living a regular life, but all of a sudden gets summoned to the other world to become a "hero." The goddess of the other world, however, insults him for being different and strips his "hero" title, before casting him off to the wilderness at the edge of the world. As he wanders the wilderness, Makoto encounters dragons, spiders, orcs, dwarves, and all sorts of non-human tribes. Because Makoto comes from a different world, he is able to unleash unimaginable magical powers and combat skills. But just how will he handle his encounters with various species and survive in his new environment. In this fantasy, Makoto tries to transform the other world into a better place despite the humans and gods having turned their backs on him.
OTT Platforms for 月が導く異世界道中 are Netflix, Amazon Prime Video, and U-NEXT
His past life and current life are intersecting--a boy with memories of two lives faces his destiny! After his mother was killed at an early age, the orphaned Rio fought his hardest to survive in the slums. One day, he awakens to the memories of Haruto Amakwa, who died in an accident while dreaming of being reunited with his childhood friend, and Rio realizing he has reincarnated in a world of swords and sorcery.
OTT Platforms for 精霊幻想記 are Hulu, U-NEXT
Suddenly summoned to a fantasy world and betrothed to the princess, Kazuya Souma is crowned the new king. Unlike the royalty before him, he won’t be using swords and magic to rule; will administrative reform really get this kingdom back on track?
When an emperor accidentally switches bodies with his empress, the two must deal with the awkward fallouts as they learn to accept each other.
A story that follows Xie Xiaoni, the daughter of a silk merchant who loses her family due to a conspiracy. Determined to stand on her own, she works on improving her skills to make a name for herself. Along the way, she finds love in Ouyang Ziyu. As the daughter of the Xie clan, Xie Xiaoni spend her life preparing to succeed the family business to become a female merchant. However, the Xie clan falls to ruin after being framed by their rival, the Su clan. Xie Xiaoni survives and vows to clear their name and revive the Xie clan. She enters the Jiangnan Yunjin manor under the pseudonym Nichang to learn embroidery skills. Years of training allows her to gain a foothold in the industry. However, the Su clan becomes aware of her intentions and attempts to silence her for good. Ouyang Ziyu who has been in love with Nichang steps up to help her.