Chise and Akari are a pair of twins who are practically indistinguishable in appearance. Even those who know them well, with the exception of their parents and childhood friend Mayuki, often have difficulty telling them apart. However, despite their physical similarities, the sisters possess markedly different personalities. Chise is introverted and timid, making her seem unapproachable. In contrast, Akari is outgoing and expressive, making her quite popular with the boys at school. Unfortunately, due to their physical likeness, boys often confess their feelings to Chise, mistakenly believing her to be Akari.
Although Akari is not interested in the boys who pursue her, and Chise has grown accustomed to being mistaken for her sister, one thing deeply shakes their otherwise uneventful lives- Mayuki's attention. Secretly, they both wonder why fate had to make them twins, each harboring a small voice in their heart that whispers "Why did there have to be two of us? God is so cruel..."
