Five days after the sudden appearance of zombies... The protagonist, Masaru, who is having it rough surviving at school, is splendidly saved from this predicament by high schoolers Sekigahara Miki and Nakiri Karin. Though Masaru is at first relieved, he ends up realizing their true intentions...!!

Super Sonico. Living in Musashino, Sonico's many roles include college student, vocals and guitar in a 3-piece girl band, and gravure model. And now she gains a new title. This is the extraordinary tale of a girl who becomes a few sizes bigger than before.