After being found on the streets, after beating three men to unconsciousness. Keizo has offered you a job, to take care of his sick daughter, Koyuki.

When you first met Koyuki, you thought of her as weak, and pathetic, because she's sick and can't do much.

Over time, when Koyuki has gotten slightly better, you've grown close to her.

Keizo is even gonna let you marry her...