After the father went missing, debts and rent were left unpaid. The mother fell ill from overworking, so her daughter begged the landlord to be his helper. The landlord, who was wheelchair-bound and inconvenienced, took advantage of her plea 'I'll do anything' to repeatedly commit sexual harassment. Initially, it was just caregiving, but his demands escalated, ultimately leading to sex with internal ejaculation. Though Koko initially resisted, she gradually became a sex slave.
