The MC is an ordinary kid He is in love with the most popular girl in his class He evolves into a different species after seeing a dog with a human face eating a human hand. Has amnesia from their school trip. The evolved form has the aspect of a dog. He is invited into a secret society formed by evolved humans. The last chapter that I have readen involves a student who wants to infect the school with an incomplete virus that stimulates evolution. He is special because he can't control his transformation also because of his abnormal healing powers.
I've read too much of cultivation novels having beasts/beast-men evolving into humans and this one has humans evolving into beast-men....? This is something new...