Zig Zag Don

Ichina is a second-year high school student who lives with her mother, Youko, whom she intensely dislikes. After her boyfriend dumps her, Ichina has a one-night stand with her best friend, Sekitani, who has also just broken up with his longtime girlfriend. The two friends must face the question of whether they can become more than friends. Meanwhile, when Ichina returns home, she finds a strange man waiting there with Youko.