From the Japanese light novel series written by Asaura, with illustrations by Kaito Shibano and anime directed by Shin Itagaki. Plot: Yo Sato, a poor high school student, goes to the supermarket and discovers a bento (boxed meal) on sale at half price. Just as he reaches to grab it, he ends up on the floor unconscious. Sato has just entered the fierce, no-holds-barred "supermarket survival battle" for half-price bento...