Osananajimi ga Zettai ni Makenai Love Come

A boy finds himself caught between two girls. His childhood friend, Kuroha, is a cheerful and affectionate girl who lives next door and often shows him kindness. Meanwhile, his first love is Shirokusa, a popular idol and talented writer at their school. Despite his admiration for Shirokusa, he is devastated to learn she already has a boyfriend, leaving him heartbroken. During this difficult time, Kuroha suggests an idea: to take revenge in the most effective way possible.