After losing his job and returning to his hometown, Ken Otsuka bumps into his old crush, Sumire Kawagoe, only to find out she's married the jerk who bullied him in high school. Crushed, he buys a bento box from Sumire's store, but to add insult to injury he finds a bug in it! She apologizes, claiming it to be an accident, however Ken can't hold back his rage and demands she strip naked. Now, with nothing but her apron on, she begs him to stop as her face flushes bright red. But though she protests, the sound of her dripping wet hole suggests she feels otherwise. It turns out Sumire is quite the naughty girl.