Shuichi Katayama is an office worker whose hobby is to love male idols. He has no girlfriend, few friends, and leads a dull life until he happens to stop at a host club and meets the host, Yu Tsukishiro. A simple businessman and a host on the verge of turning 30. The encounter in Kabukicho leads them to share their hobbies and life problems, and they gradually build a mysterious "adult friendship"...!