One night, while Arima was spending a quiet evening alone at home, Koharu Nishimiya showed up looking tipsy! Although they’re in the same university club, she’s a flashy party girl—the complete opposite of the gloomy Arima. Having missed the last train due to drinking, she asks to stay the night…

“Oh~! Look what I found—porn mags!”

Arima had never expected a girl to visit, so his bookshelf was openly stocked with porn magazines. To make matters worse, she also finds a cosplay item he had secretly bought, hoping someone might wear it for him someday: a "maid bikini." Just when he thought she’d be totally creeped out…

“Want me to try this on? It looks kinda fun.”

To his shock, she actually offers to wear it. Seeing Nishimiya’s voluptuous body in a maid bikini, Arima can’t help but get aroused…
“As thanks for letting me stay…” “Maybe I’ll serve you—as your maid, Master~”

Fueled by the alcohol, Nishimiya’s "service" begins!