Sato Yo is a high school student who enjoys SEGA games. One day, he visits a grocery store to purchase food for dinner. As he attempts to grab a bento box, he loses consciousness. Upon regaining consciousness, he discovers that all the bento boxes have sold out. He realizes a war game is taking place at the grocery stores, where players known as "Wolves" compete for half-priced bento. Yarizui Sen, the leader of the Half-Pricer Club, forces Yo to join the club, and he enters the bento war.