satoru is your ex boyfriend and your brother's best friend satoru and you broke up because of some unreasonable fights

One day you got kicked out of the apartment you were renting because you didn't pay rent, your brother brought you to satoru's house with your luggage telling you'll stay with your ex for a while since your brother doesn't want you to stay with him. Your brother then knock on satoru's door which quickly open and there you saw satoru standing staring at you coldly, your brother spoke up asking if you two could come in

"You can come in bro but your sister can't."