We’ve all seen how popular the isekai genre has become in recent years, and the harem and ecchi genres have followed suit. So we decided to compile a list of anime from all three genres. So, without further ado, here is our list of the Top 10 Isekai Ecchi Harem Anime You Should Watch!
Isekai is a sub-genre in which the main character is transported to another world, which is usually a world of mediaeval fantasy with swords and magic! Popular isekai anime include That Time I Got Reincarnated as a Slime, Re: Zero, and Overlord.
Isekai Ecchi Harem Anime Recommendations
10. The Master of Ragnarok & Blesser of Einherjar
Some urban legends should not be believed! When Yuuto Suou joins his childhood friend Mitsuki Shimoya in testing an urban legend, he gets more than he bargained for. When he uses his phone to take a selfie with the divine mirror at the local shrine, he is whisked away into another world steeped in the lore of old Norse myths.
He has the opportunity to bring the Wolf Clan, the people who cared for him, to prominence using his school knowledge and his solar-powered smartphone, all while earning the adoration of the Einherjar, a group of magical-wielding warrior maidens.
9. Conception
On the day of Itsuki’s high school graduation, Mahiru, Itsuki’s cousin, informs him that she is pregnant. A light gate appears, ushering the two into the world of Granvania. “Impurities” in this land have been causing a disturbance to the Stars, eventually leading to Granvania’s devastation. And Itsuki, who has now been revealed to be one of the “Star Maidens,” is Granvania’s last hope, tasked with producing “Star Children” and combating the “impurities.” It is possible that Itsuki will never be able to return home unless the task is completed.
8. Dog Days
Dog Days is set in Flonyard, an alternate Earth populated by beings that resemble humans but have animal ears and tails. The Galette Leo Knights’ feline forces have attacked the Republic of Biscotti, a union of dog-like citizens. Princess Millhiore summons a champion from another world to defend her people in order to save Biscotti. Cinque Izumi, a regular Earth junior high student, is that champion.
Before preparing for war, Cinque agrees to help Biscotti and retrieves the Palladion, a sacred weapon. In Flonyard, warfare is fought without casualties and is more akin to sporting events, with the goal of raising funds for the kingdoms that take part. Cinque is named Biscotti’s champion, but he quickly learns that a summoned champion cannot be returned to their home world. Biscotti’s scientists will work tirelessly to find a way for Cinque to return home, but in the meantime, he must serve Princess Millhiore as Biscotti’s hero.
7. Tenchi Muyo! War on Geminar
An unknown group kidnapped Kenshi Masaki and brought him to Geminar. To return home, he agrees to help them assassinate the Shtrayu Empire’s newly crowned empress, Lashara Aasu XXVIII, using a massive robot known as a Sacred Mechanoid.
Lashara notices Kenshi’s abilities and demands that her assailant be apprehended alive, only to discover that the pilot is male, which is unusual on Geminar. She hires Kenshi as her bodyguard because she believes it would be a waste of time to kill him.
Kenshi is assigned as the empress’s new servant to accompany Lashara to the Holy Land, a training facility for Sacred Mechanoid pilots. His presence draws notice, but Kenshi is unaware that something sinister is brewing within the academy that has the potential to bring the entire world to war.
6. Harem in the Labyrinth of Another World
Michio Kaga, a high school student, attempts to launch a strange online game he discovered while surfing the internet one day. Instead, he is transported to the world of the game and is given special abilities as well as a powerful sword. After gathering his thoughts, he finds himself fighting bandits and quickly realises that he cannot log out. Michio accepts his fate and sets out on a journey to enjoy his new life, conquer dungeons for money, and build a harem to fulfil all his manly desires.
5. The Familiar of Zero
In a world of wands, cloaks, and royalty, Louise Françoise Le Blanc de La Vallière is a self-absorbed mage. Despite attending Tristain Academy, a prestigious school for magicians, Louise has a major problem: she cannot properly cast magic, earning her the nickname “Louise the Zero” from her classmates.
Louise’s summoning causes a catastrophic explosion when first-year students are required to perform a summoning ritual! When the smoke clears, Saito Hiraga, a young man, appears. Saito, Louise’s companion, is now treated as a slave, being forced to clean her clothes and eat from the ground. An unknown brand discovered etched on Saito’s hand as a result of the summoning ritual is thought to be the mark of a powerful familiar named Gandalfr.
The Familiar of Zero is a wild, adventurous, and explosive novel that follows Saito as he adjusts to his new life and Louise proves to be more than her nickname implies.
4. Combatants will be Dispatched!
Combat Agent 6 is assigned as a chief operative to help the villainous Kisaragi Corporation conquer the entire known universe. As he is tasked with infiltrating Grace’s kingdom—a mission that could change the fate of the world—Agent 6’s arrogance grows. To ensure the mission’s success, he is assigned to travel with Alice Kisaragi, an exceptional android with a youthful appearance named after the company itself.
On the outskirts of the kingdom, Alice and Agent 6 meet Snow, the commander of the country’s royal guard. Agent 6 seizes a long-awaited promotion at his company by changing the sacred ritual recitation to an embarrassing phrase, and Snow leads the pair to a broken legendary artefact. As a punishment, the princess of the kingdom raises Him to the rank of honorary knight, thus completing part of his mission. Combat Agent 6 has infiltrated the kingdom’s inner circle and is now tasked with assisting his new employer in combating the Demon Lord’s Army while still committing evil acts as a Kisaragi Corporation combatant.
3. Arifureta: From Commonplace to World’s Strongest
Hajime Nagumo and his classmates’ ordinary lives are turned upside down when they are summoned to a fantasy world and tasked with saving humanity. While his classmates have impressive combat abilities, Hajime is ridiculed for gaining only a mediocre transmutation skill with no offensive power.
Hajime is betrayed by one of his classmates during an expedition in the Great Orcus Labyrinth, plunging him to the bottom of an abyss. Despite surviving the fall, Hajime is confronted with terrifying monsters and misfortunes, which put him to sleep. He decides to fight for his life, desperate to survive and return home one day, only to run into Yue, an imprisoned vampire also attempting to escape the labyrinth. Yue and a few others accompany Hajime on his journey to find a way back home, gradually evolving from commonplace to the world’s strongest.
2. How NOT To Summon A Demon Lord
Nobody in the fantasy MMORPG Cross Reverie can match the power of the Demon King Diablo. He easily defeats anyone who dares to challenge him, as he possesses the game’s rarest artefacts and a player level unrivaled. Despite his terrifying reputation, Diablo’s true identity is Takuma Sakamoto, a reclusive gamer with no social skills. Takuma is obsessed with his virtual life, defeating hopeless challenges day after day—until an unexpected summoning spell transports him to another world, where he appears as Diablo!
Takuma is greeted by the two girls who summoned him in this new world that resembles his favourite game: Rem Galeu, a petite Pantherian adventurer, and Shera L. Greenwood, a busty Elf summoner. They attempt to subjugate him with an Enslavement Ritual, but the spell backfires, and they become his slaves instead. Takuma decides to accompany the girls in their search for a way to break their contract while learning to adapt to his new life as the menacing Demon King as the situation becomes more awkward than ever.
1. Mushoku Tensei: Jobless Reincarnation
Despite his life of being bullied, scorned, and oppressed, a 34-year-old shut-in summoned the courage to attempt something heroic—only to have it end tragically. In an unexpected turn of events, he awakens in another world as Rudeus Greyrat, resuming his life as a baby born to two loving parents.
Rudeus quickly adjusts to his new surroundings by recalling memories and knowledge from his previous life. He begins to demonstrate magical talent far exceeding all expectations, honing his craft with the assistance of a mage named Roxy Migurdia. Rudeus learns swordplay from his father, Paul, and meets Sylphiette, a young girl who quickly becomes his best friend.
Rudeus strives to make the most of his newfound freedom while overcoming his traumatic past as he begins his second chance at life. And maybe one day he’ll discover what he couldn’t in his previous life: love.