Seiko Oomori

Shiori's blog attracts the attention of Ayumi, a timid 13-year-old girl. Ayumi's growing infatuation takes an unforeseen turn when she runs away from home and infiltrates Shiori's life.

Maki Maki, Sebuki Suzume, Beppu Tsukasa and Iemori Yutaka happen to meet and form a quartet. They even begin to live together in Karuizawa during the winter, but there is a big hidden secret.