I really really forgot how the story is. I just remember that there's a female protagonist that have female friend. Her friend have short black hair. There also a teacher character that is very kind to his student. So, I forget what happened, I think the friend had an argument with her family or her boyfriend then he choose to escape. She's missing and the mc cannot contacted her. When she was searching her friend, she met with the teacher. She asked her friend whereabout to her teacher, but the teacher said he didn't know where she was gone. But when the teacher back to his apartment, it revealed that the missing friend was hiding and living with the teacher. The teacher face looks as if he really forced to do this. The friend like the teacher, but the teacher doesn't want to have a relationship with his own student. I forgot what happened after this and before this scene. This is the only scene I remembered and I think this happened in the middle of the story. Someone remembered a story like this?

Yasashii Sekai no Tsukurikata I think there is something similar in this serie

________________

Yes, that's the one. Thank you very much!