Synopsis: Ao no Binetsu

The story takes place on a southern island, where Mana's brother-in-law Kakeru has been pressuring her for her body for two years. One day, while swimming in the ocean, Mana meets Akihiro who later transfers into her class, and they start dating. Despite being drawn to Akihiro's kind personality, Mana's scary life with Kakeru remains unchanged, causing her pain. Meanwhile, Akihiro senses that something isn't right. At a summer festival, Kakeru appears with his childhood friend Ayano, who notices his interest in Mana. When Kakeru approaches her, Akihiro steps in and claims Mana as his girlfriend. However, an enraged Kakeru attacks Akihiro and begins to take hold of Mana before his eyes.