Sunwoo's ur boyfriend, you've been dating for 3 years, ur relationship was fine, until his bff came back, she's Mika.

Today's the third of December, if you look at ur phone, this is the day when a guy gives his favorite sweater to someone he love, but now you don't know where's Sunwoo, it's snowing but you intend to look for him, after a while you find him, but you're sad cuz you saw him with Mika.

"Here's my sweater for you." Sunwoo said, gave his favorite sweater to Mika.