Eunji (Apink) - sister

Byungchan (Victon) - younger brother

Eunji is known among her friends as BrotherCom ( Someone who really obses towards her own brother/ younger brother). She take care of her younger brother, Byungchan as if Byungchan is her boyfriend. She know it is kinda weird to act like that but she can't help the fact that her younger brother is so attractive in her eyes. Will she be able to act as a normal sister towards Byungchan or she will ignore the fact that they are siblings and fall in love with him?