raped female teacher

During class, I was rubbed with semen and forced to masturbate surrounded by students. Reiko, a female teacher, was being bullied by her students. Reiko is on the verge of collapse both physically and mentally, but there is a reason why she has to continue teaching. That is what happened a year ago with Takeshi, the leader of the bullies. One day, Reiko, who can't resist Takeshi, is called to the gymnasium and gang-raped. However, in the midst of this, Reiko notices something strange about Takeshi and decides to visit Takeshi's house...