Due to always being used in the past because of her famous brother, Moon Byulyi lives her normal life almost detached from society. 

Being a genius in sports and hardworking in academics makes her celebrated by students and staff alike. Despite her learned antisocial personality, she can only reciprocate a smile and a greeting when necessary as she knows very well not to let anyone close.

That is when fate finally tries to ruin her peaceful life and send a passionate and cheerful senior right in front of her doorstep.