Luhan and Minseok are in high school and in love. Maybe too much in love. So when Minseok notices that she is missing her period, an effective test will confirm her worst nightmare. 

She is pregnant, one month pregnant.

However, when the doctor mistakes Chanyeol as the father, he will start to behave like if he were the real father. To Minseok's annoyance. And to Luhan's fury because Chanyeol may be his best friend. But Why the hell are he and Minseok spending so much time together?