A gal who missed the last train wears a maid bikini!?
One night, while Arima is spending his time alone, Nishimiya Koharu, who seems drunk, comes to visit him at his house! Although she is in the same club as Arima at university, she is a gal who is the opposite of the gloomy Arima. She got drunk and missed the last train, so he lets her stay for one night, but... "Oh! I found porn magazines!" Arima never expected a woman to come to his house, so he left porn magazines on his bookshelf. She also finds a "maid bikini," a cosplay item he bought to get his girlfriend to wear if he ever gets one ! He thinks she'll be shocked but... "Shall I wear this? It looks kind of fun'' and she ends up wearing it. Arima's crotch gets hard when he sees Nishimiya's plump body in a maid bikini... "As a thank you for letting me stay..." "Maybe I'll serve you as your maid" and Nishimiya's "service" begins, still in the midst of her drunkenness (͠≖ ͜ʖ͠≖)