MKMP-605 Mio Ichijo gets aroused by the moaning coming from his hated neighbor's room, not knowing that it's his beloved girlfriend's voice.

A couple who have been together for two years and are in a slump. Whenever Mio feels like meeting him, she goes to his house and spends her time lazily and has sex. One day, as she usually does, she comes to his house and sees her neighbor standing in front of the entrance. She quickly greets him, but he ignores her. Gradually, he gets busier at work, and when she comes home late at night, she hears a familiar moan coming from the next room... "Produced and copyrighted by KM Produce Inc."