Jingai Kyoushitsu no Ningengirai Kyoushi

I am a NEET, a nobody who has been traumatized by human relationships. I took a job as a teacher at an all-girls school where demi-humans can learn to become more human-like! I spend my days with students as the mermaid Kyouka Mizuki, the werewolf Kazusaki Ozomori, the rabbit-girl Comet Uzaomi, and the bird-girl Tobari Haneda.... learning why they want to be human, what they want to do after becoming human, and what being "human" means to them. This is neither an otherworldly fantasy nor a reincarnation re-life story. It is just a story of a teacher who spends his time with students who want to become human in a slightly different school.

(Source: Shonen Ace, translated)