Normal Love(1998)

Futsuu no Renai

Narikawa Kazui is a 16 year-old high school student who finds himself suddenly propositioned at a bus stop by a handsome young stud named Ikeuchi Akira – who knows everything about him and doesn’t hesitate kissing him right there in front of his friends. Kazui is furious – he’s not gay or even remotely into this sort of thing.
But the reason Akira knows everything about Kazui is that Akira is the school nurse and Kazui is about to stumble into more than he bargained for…

(Source: Animeraider)