Jingai Kyoushitsu no Ningengirai Kyoushi: Hitoma-sensei, Watashitachi ni Ningen wo Oshiete Kuremasu ka......?

These girls aren't human. Still, they adore humans more than anyone. I am Rei Hitoma, a NEET nearing 30 years old who was traumatized by human relationships. When I changed jobs, I ended up at an all-girls school whose purpose is to take non-humans and make them human!? I spent my days with the strange students: Kyouka Minazuki, a mermaid; Isaki Oogami, a werewolf; Sui Usami, a rabbit; and Tobari Haneda, a bird... Why do they want to be human? What do they want to do once they become human? I will learn about humans through them. This is neither an isekai fantasy, nor a reincarnation story. This is just the story of a teacher who spends time with some girls who wish to become human, in a slightly odd school. (Source: Kadokawa, translated)