Natsu no Ame

Natsu no Ame follows Sousuke, a soccer-obsessed guy banned from his club, spending his days practicing with friends Takeda and Midori, dreaming of his return. One day, while lost in a childhood memory of teasing a girl to tears over his 'first love,' he snaps back to reality and spots a beautiful girl on her phone. To save her from an oncoming motorcycle, he knocks her cellphone into the river. As a typical kind-hearted protagonist, he dives in to retrieve it, only to end up pulling her in too. Undeterred, he gives her a tour of the town and walks her to school, leaving a favorable impression. But when he returns home, he finds her there—his mother reveals she is his long-lost half-sister! This branching-plot romance features multiple endings, student heroines, and a classic tsundere.