Happy papa's birthday!

Seon-hee is a high school girl who used to tell lies to get her friends attention. She leaves Seoul guilt-ridden when her friend Jung-mi kills herself because of Seon-hee's lies. In the countryside where no one knows her, Seon-hee begins a new life as Seul-ki.

A girl who loves swimming meets a boy with webbed feet and falls in love with him. Over time, the girl gets conflicted between cheering for the boy as a promising swimmer and keeping herself from an inferiority complex. Eventually, the girl breaks up with him and loses her chance at love.

After passing the qualification exam and graduating high school early, Eunseo works part time in a convenience store while also preparing for the college entrance exam at a study room. Then one day former classmate Jiwon turns up, and her arrival stirs Eunseo’s heart as the walls she had built up slowly begin to break down.