kim dongyoung, also known as doyoung to his friends, is one of the biggest nerds campus. he's teachers pet to his science professors and excel in pretty much any given subject. his main subject is, of course, science - specifically biology. as a senior, he works in a research lab and passing his classes with flying marks. he isn't one to help others unless it's his friends - who are known as nct127 who participates in soccer or basketball. but then... she came along.

jeong sooyeon is considered as someone who loves to make friends and make people's days; however, she isn't the brightest of the pack when it comes to her grades. as a student who isn't so great in the arts of science, she's failing her microbiology course. so, she decides to find help in the one person she never thought she'd have to ask.