Sera is a breaking through author while her twin brother Kai is a famous producer/music composure to the most famous jpop boy group Y.L.T. One day, Kai leaves a note telling Sera and his mom that he has left to travel and for them to not search for him. With Kai's departure, what will happen to Y.L.T and who will compose for them? Don't worry, Kai has already have that planned out. Before leaving, Kai sends a notification to Sasaki-san, the assistant manager to Y.L.T to go look for a specific someone. Someone who has long black hair. Tall and skinny with a beautiful face. A face that almost matches his.