"Fuku-chan is this. Not pleasant...?" Despite being a sergeant, Takashi Fukutomi, His work is not going well, and he spends his days passing by his fiancée. He rents a flat as a place where he can relax on his own. Every day, he made a side dish out of the sound of his neighbour's sex, which he could hear through the walls. One day, he discovers that the neighbour is his childhood friend Tanuma Taro, but at the same time he finds out about his hidden sexual proclivities. ......? A love story about the reunion of a sergeant with a twisted sexuality and a naughty childhood friend!