Makio Kōdai is a 35-year-old novelist who dislikes social contact. Asa Takumi is Makio's 15-year-old niece left orphaned after her parents die in a car accident. While Makio had a strained relationship with Asa's mother, she takes Asa in after becoming frustrated with how the rest of their extended family treats her as a burden.
The two soon begin living together, and although Asa's friendly personality clashes with Makio's reserved nature, they adjust to their new life as Asa works through her grief and Makio tries socializing for the first time in years. At Makio's suggestion, Asa keeps a journal about her daily life and feelings.
