Eun always hated Valentine's day, but maybe this one was meant to be different. Two years after the airing of My Best Oppa, Eun and Mi Young are living in their aparntment again, but have continued to be subjected to the random invasion by certain idol groups (SHINee, Infinite and Super Junior), with Mi Young gone kidnapped by a certain evil Maknae she can finally have some alone time. And drudge about her Valentine's Day by eating chocolate and feeling annoyed, but a visit from a certain Monkey will change those plans.