Looking for the name of this old BLCD! Help!

[SeaWater]

Hi I'm looking for the name of an old BLCD -I don't even remember the seiyuus- but it was a teacher x student relationship. The seme (teacher) came across the uke during a rainy night and I think he thought that he was a girl. And so gave him a ride to the dorm(?). The seme is a new teacher at this school and I'm pretty sure he doesn't know it's an all boys school. Another detail I remember was there was another student that had a crush on the teacher and kept seducing him (unsuccessfully)

[Keikiira]

As far as I know, the story is almost like that is Hougen Kareshi to Roomshare~ whose voice is Eguchi Takuya x Murase ayumu. but I don't know if it's true or not.. as far as I know that's the only story that's close to your description..