10 Isekai Ecchi Harem Anime You Need To Watch

We all know how popular the isekai genre has gotten in the last couple of years, and the same can be said for the harem and ecchi genres. So, we thought why not create a list of anime with all of the three genres? So, here’s our list of 10 Isekai Ecchi Harem Anime You Need To Watch!

For those of you who don’t know what isekai is, It’s a sub-genre where the main character is transported to another world, which is in most cases a world of medieval fantasy with swords & magic! That Time I Got Reincarnated as a Slime, Re: Zero & Overlord are some of the popular anime from the isekai genre. If you’re interested in isekai anime, check out Best Isekai Anime of All Time (July 2022)

Isekai Ecchi Harem Anime Recommendations

10. The Master of Ragnarok & Blesser of Einherjar

Some urban legends are best left untested! 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.

Using his knowledge from school and his solar-powered smartphone, he has the opportunity to bring the Wolf Clan, the same people who cared for him, to prominence, all while earning the adoration of the Einherjar, a group of magical-wielding warrior maidens.

9. Conception

On his high school graduation day, Itsuki’s cousin, Mahiru, tells him that she’s pregnant. Just then, a gate of light emerges and transports the two into the world of Granvania. In this land, “Impurities” have been causing a disturbance to the Stars, ultimately plunging Granvania into chaos and disorder. And Itsuki, now revealed to be one who is fated to meet with the “Star Maidens,” is seen as Granvania’s last hope and was thus given the task to produce “Star Children” and combat the “impurities.” And unless the task is complete, Itsuki may never be able to return home.

8. Dog Days

Dog Days takes place in the world of Flonyard, an alternate Earth inhabited by beings who resemble humans but also have animal ears and tails. The Republic of Biscotti, a union of dog-like citizens, has been attacked by the Galette Leo Knights’ feline forces. 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.

Cinque agrees to help Biscotti and retrieves a sacred weapon known as the Palladion before preparing for war. Warfare in Flonyard is fought without casualties and is more akin to sporting events with the goal of raising funds for the participating kingdoms. Cinque succeeds as Biscotti’s champion, but discovers that a summoned champion cannot be returned to their home world. Biscotti’s scientists will work hard to find a way for Cinque to return home, but in the meantime, he must serve Princess Millhiore by fighting as Biscotti’s hero.

7. Tenchi Muyo! War on Geminar

Kenshi Masaki has been kidnapped and brought to the world of Geminar by a mysterious group. To get back home, he agrees to help them assassinate the newly crowned empress of the Shtrayu Empire, Lashara Aasu XXVIII, using a giant robot called a Sacred Mechanoid.

Lashara notices Kenshi’s abilities and demands that her attacker be captured alive, only to discover that the pilot is male, which is extremely rare on Geminar. She employs Kenshi as her bodyguard because she believes it would be a waste to kill him.

Kenshi, as the empress’s new servant, is assigned to accompany Lashara to the Holy Land, an academy where Sacred Mechanoid pilots hone their skills. His presence draws attention, but Kenshi is unaware that something sinister is brewing within the academy, with 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 browsing the internet one day. Instead, he is transported to a rural village in the game’s world, where he is given special abilities and a powerful sword. After gathering his thoughts, he finds himself fighting bandits and quickly realizes that he cannot log out. Michio, resigning himself to fate and accepting this reality, embarks on a journey to enjoy his new life, conquer dungeons for money, and build a harem to satisfy 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 is unable to 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! Everyone thinks this is another failure, but when the smoke clears, a young man named Saito Hiraga appears. Saito, Louise’s companion, is now treated as a slave, forced to clean her clothes and eat from the ground. However, when an unfamiliar brand is discovered etched on Saito’s hand as a result of the summoning ritual, it is thought to be the mark of a powerful familiar named Gandalfr.

Wild, adventurous, and explosive, The Familiar of Zero follows Saito as he comes to terms with his new life and as Louise proves that there is more to her than her nickname suggests.

4. Combatants will be Dispatched!

8+ Isekai Ecchi Harem Anime You Need To Watch

Combat Agent 6 receives orders to help the villainous Kisaragi Corporation conquer the entire known universe as a chief operative. Tasked with infiltrating Grace’s kingdom—a mission that could change the fate of the world—Agent 6 incorrectly believes that his combat skills are superb, fueling his arrogant attitude. 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.

Upon their arrival at the outskirts of the kingdom, Alice and Agent 6 encounter Snow, the commander of the country’s royal guard. Snow leads the pair to a broken legendary artifact, and Agent 6 takes advantage of the opportunity for a long-awaited promotion at his company by changing the sacred ritual recitation to an embarrassing phrase. As a punishment, the princess of the kingdom makes Him an honorary knight, completing part of his mission. Combat Agent 6 has infiltrated the kingdom’s inner circle and must now assist his new employer in fighting the Demon Lord’s Army while continuing to commit evil deeds as a Kisaragi Corporation combatant.

3. Arifureta: From Commonplace to World’s Strongest

Hajime Nagumo’s ordinary life is upended when he and his classmates are summoned to a fantasy world and tasked with saving humanity. While his classmates have impressive combat abilities, Hajime is mocked for only gaining an inferior transmutation skill with no real 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 menacing monsters and misfortunes that send him into a bleak nightmare. Desperate to live and return home one day, he decides to fight for his life—only to meet Yue, an imprisoned vampire who is also trying to escape the labyrinth. Yue and a few others accompany Hajime on his journey to find a way back home, while gradually transforming from commonplace to the world’s strongest.

2. How NOT To Summon A Demon Lord

When it comes to the fantasy MMORPG Cross Reverie, none can match the power of the Demon King Diablo. He overpowers all who are foolish enough to confront him, as he possesses the game’s rarest artifacts and an unrivaled player level. Despite his terrifying reputation, Diablo’s true identity is Takuma Sakamoto, a reclusive gamer with no social skills. Takuma cares about nothing but his virtual life, defeating hopeless challenges day after day—that is, until a summoning spell suddenly transports him to another world where he has Diablo’s appearance!

Takuma is greeted in this new world that resembles his favorite game by the two girls who summoned him: Rem Galeu, a petite Pantherian adventurer, and Shera L. Greenwood, a busty Elf summoner. In an attempt to subjugate him, they perform an Enslavement Ritual, but the spell backfires, and they become his slaves instead. Takuma decides to accompany the girls in finding a way to unbind 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 being bullied, scorned, and oppressed his entire life, a 34-year-old shut-in mustered the courage to attempt something heroic—only for it to 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 adapts to his new environment by retaining his memories and knowledge from his previous life. He begins to demonstrate magical talent that exceeds all expectations, honing his skill with the assistance of a mage named Roxy Migurdia. Rudeus is taught swordplay by his father, Paul, and meets Sylphiette, a young girl who quickly becomes his best friend.

As Rudeus’ second chance at life begins, he strives to make the most of his newfound freedom while overcoming his traumatic past. And maybe one day he’ll find the one thing he couldn’t find in his previous life: love.

Let us know what’s your favorite isekai ecchi harem anime in the comments below and as always, thanks for reading!

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