Gui Gui is the naivest in her family. Her Shuai(Handsome) Ge and Ke Ai(cute) Jie came back to Taiwan from States and gave Gui Gui a gift with her name on it 
and she promise them to always wear it and never take it off and she even name it 'Siblings Gift'...The three of them decided to go to mall to have some siblings bond. When they are happily walking around the mall Gui Gui accidentally bump into "SOMEONE" and the gift that Gui Gui's siblings gave her accidentally slip in her wrist without her noticing, and that "SOMEONE" saw it, HE didn't bother to return it because they already left and HE was too lazy that day to chase them...Gui Gui is so sad when she realize that she lost one of the most important thing in her life so she go back at the mall to look for it but she couldn't find it...Next day, the school started and there are four(4) students transferring to Dong Han Academy, and Gui Gui saw that the cute and mischievous one has her 'Siblings Gift'...She plans some tricks to prank him to get her 'Siblings Gift' but her plans are always failed and what if she already fall in love with that 'SOMEONE'?