One time when Jinki, Taemin and Key hang out to their school. Jinki saw a wallet laying on the floor. Sophie is the owner of the wallet, she returns where she and her friend last been, but her wallet was nowhere to be found anymore. Her tuition fee, allowance is there, and her wishlist is their too. She cried all night worrying where to get a money. The next day, a guy returned her wallet. Then, the love story goes on thanks to the wallet.