Natsu, who came to Tokyo with her boyfriend Kazuma in a food truck, was living happily. In order to open a bento shop, an acquaintance introduced her to a restaurant and allowed her to use the restaurant's kitchen before business hours. One day, Kazuma is grabbed by the rich and tyrannical restaurant owner Katayama, who makes fun of her bento. Having incurred Katayama's wrath, Natsu apologizes to calm him down. In order to protect her boyfriend's dream, she has no choice but to accept Katayama's summons so that the shop doesn't go under. Natsu's body is gradually being stained by the techniques of the powerful man...