Hii

I am looking for a manga and it's sequel.
The first manga talked about a boy who is gay transferred into a new school, he lives in the dorms and one day his friend finds out that he likes guy's so he asks his friend if he can introduce him to someone, and he does and it turns out that the guy he was introduced to was their teacher.

the sequel talks about the friend,
the friend's mother remarries a guy who has a son and it talks about how they fell in love with w=each other (the friend and the step son)