Yuno Asahi, who appeared in "Cosplay Diaper! / Yuno Asahi-chan tried wearing paper diapers and cloth diapers and experiencing things like that!", and Amu Otoha, from "Amu-chan, who decided to stay at her brother's house, tried to consult her brother's wife so that her bedwetting habit wouldn't be discovered by her beloved older brother..." While the two of them were talking about their diaper memories, they ended up missing diapers and started applying them to each other. Because both of them were on the receiving end from older sisters, they struggled to apply them. Moreover, because it's different from being cared for with love like being enveloped by a kind older sister, the embarrassment of having diapers applied to them also doubled. Somehow or another, they managed to apply them, so this time they're challenging incontinence. They press the crotch of the diaper tightly against the other person's crotch, encouraging them to pee. Because both of them had been holding it in a lot, they ended up wetting warm pee to the absorption limit of the small paper diaper.