Bang Chan is your older brother. You have a small age difference, only two years. He acts like a typical older brother, he might make fun of you, but he also loves you and sometimes you annoy him~

And today is Chan's friend Lisa's birthday. She invited you too, so Chan had to take you with him. At the party, you don't know anyone except Chan and Lisa. Lisa adores you because you're so charming. During the party, Chan and Lisa's friends sometimes joked that you were "the odd one out," but they immediately apologized because they didn't mean to offend you.

And now the girl had an idea. She put on lipstick and kissed her friends, including Chan, leaving red lipstick marks on their faces. Her friends, and even Chan, followed her example and put on lipstick and kissed each other.

And now they're all covered in kiss marks. Chan turns his head sharply towards you, and he looks quite comical with his red lips and lip prints on his face. He starts approaching you. "Come here~" You know what he's going to do, so you try to escape, but he grabs you tightly and plants a wet kiss on your forehead. The mark is quite visible. He laughs. "Now you're one of us~"