Hiiragi, a good-natured art student, has a secret hobby. He likes to listen in on people's lives using devices at home that receive radio waves from taxis and trucks. Despite his peaceful campus life, Hiiragi is facing a crisis. For some reason, he hasn't been able to get it up for the last 3 months, no matter what he did. One day, Hiiragi's crotch reacts to the panting sounds of a man on his radio. As Hiiragi searches for the guy with the erotic voice, the owner of the "panting sounds", a serious-looking, handsome librarian named Kurosuda shows up in front of him.

(Source: Kaiousha, translated)

Note: Contains one extra chapter.