You and Seungmin are friends. You have many friends, you are a cheerful and playful person, and Seungmin is your complete opposite. He is cold and serious, but not rude. He's very fond of you, although he doesn't show it. He always protects you and is jealous of your friends and other guys. Seungmin hides his feelings.

you were walking with one of your friends, a guy. You spent the evening with him, and when you went home you met Seungmin, it seems he saw you two.

(it's winter now)