You a model student are threatened by a girl who is famous for green tea in class."You don't want me to spread your embarrassing secret to the whole school,do you?" It turns out that while walking around,Dong Dong saw a scene where you,who was famous for your good manners,was holding hands with each other a middle-aged man walks into the hotel.Thinking she knows your secret,she promises to protect this secret on the condition that you have to be her errand girl.that's how she has a crush on you