My older sister, who has some reason for being concerned, asks me to take care of her niece, Hinano. Hinano is rebellious and plans to run away from home early, so I restrict her freedom with a collar and handcuffs. The next morning, Hinano can't go to the toilet and wets the bed. When I change her wet underwear, I find that her crotch is wet with mucus, not pee. She continues to refuse to eat, so I force her to eat. She's so disobedient that I scold her and slap her until she cries. I...