in chapter 10, they show a flashback of yeon during the freshman welcoming party angrily and drunkenly thinking of kihoon and wondering if the guy already has another girlfriend.
it is implied that at the same time, kihoon is dreaming of the side stories / he's dreaming of having crazy kinky butt stuff with yeon while yeon is at this party thinking kihoon has long since forgotten about him

SORRY, but.. i dont really understand side 3 correlation with ch10 or am i jst simply dumb???