本作は親友の死を受け入れられずにいる女性・真奈が、深い悲しみを抱えながらも前に踏み出そうとする姿を見つめる12年間の物語。Mana Kotani was friends with Sumire Utsuki for years. She admired Sumire's freewheeling ways and mysterious charm, but Sumire broke off connections with her. Later, Mana hears of Sumire's death, which she cannot get over.