義妹になったヤンデレストーカーがすべてを大義名分化してくる～気づいたら正妻の座を確立していた～ (Associated Names)

Yandere? No no, this is just family love so there’s nothing wrong with it, right? (Pressure) Utsumida Kotoya’s father was entering a common-law marriage. His partner was apparently a former colleague whom he had known for quite some time. While they were going to live together in a new home, his partner also had a…