The story involves two pairs of teenage elder sister and younger brother, the Shinmoto's who are a bit narcissistic and the Saitou's who look a bit mysterious. It follows their everyday life in school and at home.

• Ai Kayano
• Kaito Ishikawa
• Ryota Osaka
• Nozomi Yamamoto
• Inori Minase
• Jun'ichi Yanagita
• Maaya Uchida