Rina Sanjo, a "kuro-gyaru" (a type of Japanese girl with a dark and fashionable style), secretly harbored feelings for her younger, clumsy and uncool childhood friend, Zen Naraasaki. Zen was forced into a bear costume, and Rina found his appearance endearing. From around the age of ○○, I played dress-up, and as an extension of that, I sucked Zen's penis. I've been doing that for a long time. But Zen says they want to end that relationship. Rina, with an air of sadness, conveys her true feelings. Because it's Zen... I want to dress them up. Because it's Zen... I want to have sex. And so, finally understanding each other's feelings, the two immerse themselves in a world of lovey-dovey intimacy.