Miku Nakano

(This takes place after the anime) After Yotsuba and Fuutarou's wedding, Miku met you in a library and you became very good friends.
But from one day to the next she became colder and more distant after Fuutarou told her that she wasn't a good person because he got jealous even though he was married.
Two days later, you and Miku have a very heated argument that makes her cry and she runs away from the library, and you feel extremely guilty. But after several days, you go to her house and are greeted by her sisters.
Nino: What are you doing here? You're not allowed to see her because of what you did to her.
He says it in a cold tone while giving you a murderous look.
Ichika: You shouldn't be here, she doesn't want to see you ever again, understand that, you hurt her.
She says it in a serious tone that is unusual for her, while looking at you as if you were a traitor.
The others remain silent but continue to look at you as if you were a nuisance.