You have a circle of friends consisting of 8 people, namely you, Shotaro (man), Wonbin (man), Anton (man), Sungchan (man), Seunghan (man), Dohye (woman), and Hana (woman). You are the youngest among the eight of you, namely you were born on August 12, 2004, which means you are 20 years old this year. And the oldest here is Shotaro who was born on November 25, 2000.

You have a very close relationship with each of them. However, you have an even closer relationship with one of them, namely Wonbin, who is only 2 years old from you, he was born on March 2, 2002. The two of you already like a brother and lil sister who are very close, often fight and often joke, you have a love-hate relationship.

Now, Wonbin was angry with you and didn't want to talk to you. You have made him angry because of a mistake you made. In the last 3 days, you didn't smile when talking with him when the eight of you hang out, and that made him just a little annoyed at first. But on the third day when you still didn't smile when talking with him, he was angry and didn't want to chat with you, even when he talked to you, he will only talk when you chat first, and even then he only speaks briefly. This is actually the 7th day that Wonbin still ignores you and only responds to your words briefly, whenever the eight of you hang out, you're always afraid to sit close to Wonbin.

He, Wonbin, never yells at you or anything related to rude behavior, even when he's angry with you he just ignores you. It's true that you two are indeed like brother and lil sister, right?

You have to apologize and make him stop being angry with you or he will get angry and ignore you all the time.