Hoshino aka Sora, kisses Kamizaka and blackmails him with a picture taken after the kiss. For Hoshino is not a big deal because he's an actor and is used to kiss and be kissed but, that one, was the very first kiss for Kamizaka and now, he feel flustered around Hoshino. Little by little Hoshino gets interest in Kamizaka who is so innocent and honest and as they become friends Hoshino becomes aware of his true feelings.
Koi Wa Etude!