Looking for doujihin hentai?

A school teacher that is a male, who just turned into a girl with big boobs black hair. He was gonna beat up some mischief kids(all boys school), but now he's a weak girl.He ends up getting raped by the boys, and tied up in the bathroom where they tied him up, and let's the students have sex with his girl body.Later after he reports the incident the teachers started raping him. There was a swimming scene where he gets raped again in a tight swimsuit. It ends with him being tied up to a bed. Plz

Just to be clear the teacher is a girl with a man's mind because he went from man to woman. Please find it 10 points to the person that does.