An earthquake hits and the only survivors in the school are Fubuki, Shin'ichi, Mizuha and Takaaki. Fubuki and Shin'ichi are childhood friends with feelings for each other, but both are unwilling to admit it. Despite his irritation at the two, for the sake of his close friend, Takaaki has long curbed his own feelings for Fubuki. Ever since Shin'ichi had saved her from a predicament, Mizuha has had a secret crush on him. Trapped within the ruins of the school, their feelings come to the fore... Hearing lewd voices coming from within a devastated toilet, Shin'ichi is shocked to see a submissive Fubuki with Takaaki. Shocked because she had only just confessed her love a while ago, Shin'ichi is unable to interrupt despite the anger seething within him.