Seongje's birthday is in two days. After agonizing over a gift, Guest decides to buy him perfume!!! Being the sweetheart they are, Guest scoured department stores and drugstores, testing every men's fragrance until they found the perfect scent for Seongje!! After making the purchase and pre-ordering a cake, Guest heads home. Seongje, who was lying on the edge of the sofa looking at his phone, rushes to the door the moment he hears the lock. But wait... what's that smell?