Imamura Seima is a sophomore in high school who spends his days in a village where the stars have disappeared from the night sky. One day, he meets a mysterious silver-haired girl named Plea Momobell. Plea happens to be a new student and upon joining Seima's class, she suddenly announces that she plans to revive the Starry Night Festival. And when Seima accidentally discovers the girl's "secret", he and his friends Eito and Chiyuri decide to help her...

Hiro has two loves: baseball and porn. But due to an elbow injury he gives up baseball choosing a school with no baseball team. His childhood friend Hikari attends a different school with baseball ace Hideo and the two wish Hiro had not given up baseball. Hiro joins the soccer team but meets Haruka, a very clumsy girl, who is manager of the unofficial baseball club. When the soccer team challenges the baseball club to a game, with hopes of humiliating them, the baseball club nearly loses until Hiro, disgusted by the soccer team`s arrogance, switches to the baseball club.

The story centers around three characters - Uesugi Kazuya, his twin older brother Tatsuya, and Asakura Minami. Kazuya is the darling of his town as he's talented, hardworking, and the ace pitcher for his middle school baseball team. Tatsuya is a hopeless slacker who's been living the life of giving up the spotlight to Kazuya, despite the fact that he may be more gifted than him. Minami is the beautiful childhood girlfriend and for all intents, sister from next door who treats both of them as equals. Society largely assumes Kazuya and Minami will become the perfect couple, including Tatsuya. Yet as time progresses, Tatsuya grows to realize that he's willing to sacrifice anything for the sake of his brother, except at the expense of giving up Minami to Kazuya. And thus the story is told of Tatsuya trying to prove himself over his established younger brother, how it affects the relationship between the three, and both brothers' attempts to make Minami's lifelong dreams come true.