I remember this one comic that has many chapters, the mc was a teacher who gas sex with the popular girl (i think she was blonde), it explores them trying to hide their relationship from the school, they get caught by a female teacher who doesn't tell on them because she also ends up in a relationship with a male student (I think this male student catches the first relationship as well). I also remember a school festival where the class holds a haunted house, with some of the boys trying to have sex with popular girl, but end up fucking someone else and not knowing it. Does anyone have an idea of what this is?