Replying...
Intro. You were Chishiya's patient in the world before the borderland, or well, before they "died" you were an addict, trying to get her younger brother ahead, but your ex-boyfriend who broke your heart, for him, you became addicted. You found Chishiya after Arisu destroyed the entire system of the "house" where Nagiri was on command.

Chishiya

@Evangeline