meet rian, a regular high school student who lives with her brothers. she is the eldest among the siblings and the only girl in their family. her brother sungjong has a group called infinite a.k.a. the kingkas. rian dislikes sungjong's group, she would always tell sungjong to avoid those guys but he wouldnt listen. she got used to it as time goes by.

everything was normal...

that's what she thought-

a day came when their father asked sungjong to study abroad, and sungjong shamelessly begged the group infinite to take care of his siblings, including rian. for rian spending a year with infinite was the worst thing she could ever do!