Ano Ko No Himitsu

Two high school friends, Moe and Natsumi, begin living together in the spring. After Moe starts dating someone, Natsumi behaves oddly. She sends Moe numerous messages and tries to keep her boyfriend away. The reasons behind her actions remain unclear. The story is divided into four parts: "Her Secret," "Spring Is Coming," "Goma's Feelings," and "Hey, My Darling."