Mai Fukagawa

Kiyoko Tachibana, a student at an integrated middle and high school for girls in Tokyo, met Akari Okusawa, who was wearing a bright blue dress, at the start of the new school year in her first year of high school. In contrast to the other students, Akari freely interacts with everyone and quickly becomes popular, and Kiyoko is attracted to her. Kiyoko's newly awakened feelings for her soon involve the whole class, and the situation develops into a disturbance.

It is the year 1988. Yamabuki is an eight-year-old little boy growing up in a traditional family where every family member has problems and secrets they try to hide from each other. The father runs a failing construction company and has an intimate relationship with another woman. The mother is struggling with severe depression, as she cannot cope with the death of her youngest child. The grandfather, who used to be a construction engineer, hopes to start building an amusement park, but to no avail. The grandmother runs a small store where she sells items of forged origin. The sister is fed up with the lies of her predecessors and is looking for a way to run away from home. In the midst of all this chaos, Yamabuki has started to find solace in patting an imaginary dog.