The BS Situation of Tougetsu Umidori, Vol. 3 (light novel)

On the first day of summer vacation, everyone throws an okonomiyaki party at Umidori's place. Yet once more, this is merely the gateway to crazytown. The combination of yakisoba and white rice leads Umidori and company to a dangerous discovery, and they throw themselves into battle. Specifically, Bullshit-chan uses her video channel to host a stall at a local festival. Local dishes from Hyogo Prefecture, visits home, a soumen-slurping Seiryoin, writing implements that don't undress properly, Umidori and Nara's first big XXX, and his first appearance. Things are more off-the-wall than ever before!