Sakamoto Tsugirou

A girl asks Katsuragi Shouta to take a picture of her with Enoshima in the background. Embarassed by her cuteness, he takes the picture and runs away. He later finds out that she is an actress by the name of Shinomiya Sana. A TV drama, Koisome Momiji, will be shot in Shouta's town and Sana will be starring in one of the lead roles, as a passionate girl who whole-heartedly chases after the guy she loves. However, Sana has never experienced that kind of love. To practice for this role (and maybe truly fall in love) Sana asks Shouta to be her boyfriend!

Daichi's, a teenage boy with little experience with women, life takes an unexpected turn of events. After his mother's remarriage, he obtains a new sister, who is no other than the famous idol Asano Nanami. What is Daichi going to do when they end up alone together and Nanami wants nothing to do with him? From the makers of Koisome Momiji.