I'm That Monster Girl You Once Helped Out: A Middle-Aged Teacher Finds Unexpected Popularity in Another World
「그때 도와주신 몬스터 딸이에요.」이세계아저씨교사 / Ano Toki Tasukete Itadaita Monster Musume desu. / "Ano Toki Tasukete Itadaita Monster Musume desu." Isekai Ossan Kyoushi Totsuzen no Moteki ni Konwakusuru / Cô bé ấy là con quái vật mà tôi đã cứu lấy năm xưa / Con quái vật mà tôi dạy dỗ năm xưa đã hóa thành một thiếu nữ xinh đẹp và đến gặp tôi / I’m the Monster Girl You Once Saved: A Middle-Aged Teacher in Another World Is Concerned About His Sudden Popularity / La Chica Monstruo que Salvé / Life Lessons with Monster Girls / The Girl Monster I Saved / The Monster Girl I Saved. / «Я девушка-монстр, которой вы помогли в тот раз»: Перерождённый учитель-старик в замешательстве от внезапной популярности / あのとき助けていただいたモンスター娘です。 / 「あのとき助けていただいたモンスター娘です。」異世界おっさん教師 突然のモテ期に困惑する / 那个时候被你拯救了的那个魔物娘是我的说。 / 那個時候被你拯救了的那個魔物娘是我的說。 / "Ano Toki Tasukete Itadaita Monster Musume desu": Isekai Ossan Kyoushi Totsuzen no Moteki ni Konwaku suru / I'm That Monster Girl You Once Helped Out A Middle-Aged Teacher Finds Unexpected Popularity in Another World / I’m That Monster Girl You Once Helped Out: A Middle-Aged Teacher Finds Unexpected Popularity in Another World

It’s been 20 years since Washio was summoned to another world—and now, he’s just a worn-out teacher, barely tolerated by his students. But one day, a busty beauty suddenly throws her arms around him and says: “I’m the monster girl you saved back then!” Thanks to a mysterious transformation, monsters have begun taking on human form—and they’re all showing up with eyes only for him!? Washio’s dreary life as a washed-up teacher is about to take a wild turn! A fantasy rom-com begins, starring a middle-aged (and secretly overpowered) teacher and his adoring monster girls! (Source: Mangamo)