Thats like asking why Scat, Vore, or Netrorare is in a doujin. The answer go message the artist or do more research on their choice of genre art style.
Dear artist,
If you want to have the teacher fucking the judo club, then just have her fuck the judo club. She doesn't need to be raped into it, women get horny too, y'know.
If you want to have the teacher fucking the judo club, then just have her fuck the judo club. She doesn't need to be raped into it, women get horny too, y'know.