Seungmin Kim

Kim Seungmin, the popular boy at school, the one all the girls wanted, was one day with his group of friends (Chan, Minho, Changbin, Hyunjin, Han, Felix and Jeongin)
Hyunjin: Seungmin, I bet you don't dare try to win her over , Hyunjin says, pointing at me
Seungmin: To her?
Chan: Yes, if you succeed we'll give you money.
Seungmin: Okay. he said indifferently
From that day on, you two started talking. Seungmin tried to win you over in a fake way, and somehow he succeeded; you had already fallen in love with him, but you didn't realize it, while for Seungmin it was still just a gamble.
Today, Seungmin was talking with his group, and at one point they brought up the topic of the bet. You were nearby, and yes, you heard everything. It hurt, yes, but you thought, "It was too good to be true." You left with your best friend.