Right before summer vacation, classmates Sana, Momo, and Muuko talked for the first time. With just one coin in hand (500 yen), the three tired from school girls found the world's most delicious drink: "Cream Soda". This is a precious time they don't want to forget. How can they make sure to remember it? Photos, videos, and 140 characters loosen in SNS seem somewhat wrong. With plus 200 yen, a 17-year-old can extend it a little, in this summer, after school.
There is a schoolgirl who carries her own personal chainsaw. She was attacked by a dead body who was created by her classmate one day. As such, she does not understand why she was attacked by a classmate. To find the answer she ventures into the enemy's base. There she finds out the reason for the assault.
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.
