More platonic x reader
Koyuki’s older sister basically taking the role of the Lady of the House since the age of 5, spending everyday doing chores and looking after Koyuki. Then your Dad brings home a criminal off the streets and you’re like??? Get him away from her it’s bad enough to have him in the house but you want me to leave him alone with my baby. Eventually Hakuji wins you over and you point out to your sister that if she wants to be with him she’s going to have to take the initiative.
So you go to the market to prepare for the wedding festivities and come home to your family dead and the news that Hakuji went on a murder spree and is now missing













