the MC was depressed and about to do SA but before that he decided to join a swimming class, then he falls in love with the swimming teacher. the teacher turns out to be a shark/whale-man.
https://www.mangago.me/read-manga/dolphin_fairy/
omg thankyouu <3 so it's dolphin not shark/whale :")
the MC was depressed and about to do SA but before that he decided to join a swimming class, then he falls in love with the swimming teacher. the teacher turns out to be a shark/whale-man.