ACZD-160-2 Girl Confinement and Raising Hinano Misaki

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...