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

Mako Saitou

Mao Saitou

Chiko Shinmoto

Chika Shinmoto

Iori Maruoka

Ui Umezono

Shiyo Kohara