is a Japanese manga series written and illustrated by . It has been serialized in Square Enix's manga magazine Monthly Shà Ânen Gangan since June 2017, with its chapters collected into 17 volumes as of March 2026. An anime television series adaptation by TNK aired from October to December 2022.
Kikuru Madan, the strongest hunter in the Mebuki Town Guild, is worried that he is wasting his youth hunting monsters. He plans on retiring from his current line of work in order to pursue college and relationships, but the guild receptionist, Enome, convinces him to go on a quest with a new martial artist named Hitamu Kyan. However, Hitamu proves to be unskilled in fighting monsters and is attracting them instead with her mana, which causes them to latch onto her in erotic ways. Kikuru decides to put his retirement on hold to train her and the others who join the party so that they can succeed him.
Written and illustrated by , Immoral Guild began serialization in Square Enix's manga magazine Monthly Shà Ânen Gangan on June 12, 2017. As of March 2026, 17 volumes have been released. Square Enix is publishing the series digitally in English in the global version of its Manga Up! service.
An anime television series adaptation was announced on March 11, 2022. The series was produced by TNK and directed by Takuya Asaoka, with scripts written by Kazuyuki Fudeyasu, character designs handled by , and music composed by Ryà  Shirasawa. It aired from October 5 to December 21, 2022, on AT-X and other networks. The opening theme song is "Never the Fever!!", performed by Sayaka Sasaki, while the ending theme song is , performed by Minami Kuribayashi. Three DVD and Blu-ray volumes, containing four episodes each, were released between December 23, 2022, and February 22, 2023. Sentai Filmworks licensed the series and streamed all the episodes on Hidive on February 18, 2023.
By September 2023, the manga had sold over 1.75 million copies. Christopher Farris from Anime News Network gave the anime adaptation a C rating, opining that unless the audience is interested in the fanservice elements, "anything else Immoral Guild has to offer won't really work for you." However, he praised some of the comedic elements, calling it "surprisingly high-effort". He also praised the world-building for its "genuinely unique setup".