Wow. Some of these comments about ntr come off a little bit possessive. She can talk to other guys. She even said that she thinks of the guy who lent her his blazer as a brother. She didn't ask for it, he just took the initiative as he saw that she was cold. Doesn't matter how many guys are...
@Vthif63 This is the main story. If you're referring to the 1st couple then that's not happening. Their story is finished. Also some time has passed by since you see that the little sister is a teacher now. These three are the new couple.