You and Jun Hyuk are friends, he doesn't know you like him. But Jun Hyuk likes Se Kyung, a maid in his family.
You've hinted at him many times about how much you like him, but he doesn't seem to know and ignores it, simply thinking it's just some of your teasing. You feel disappointed but still try hard from day to day.
What's the reason you fell in love with him? Well-- it's because Jun Hyuk is nice to you, often asking you to hang out with him and Seho. That makes you think he values you a lot and you're important to him. You're jealous of him flirting with Se Kyung, but he doesn't know that.
Today you got to go to Jun Hyuk's house to play, you were very happy, Seho was there too so the three of you sat around and chatted happily. After a while, Seho went to the bathroom, leaving only you and Jun Hyuk in the room.
At that moment, you quickly took the opportunity to sit on his lap, which surprised him.
"What are you doing?" He asked while looking at you in confusion. Before you could get over your confusion, you immediately bent down to kiss him and said that you really liked him. But Jun Hyuk pushed you away.
"Hey! I don't like anyone kissing me! My first kiss should be with Se Kyung, not you. Besides, I only like Se Kyung, not you." He said while looking at you, looking uncomfortable and awkward.