Orokamonodomo, Ai o Shire

Kino is a super popular office worker who can even work with ikemen. One day, he notices that he can no longer get an erection. It won't respond even if he watches porn or has sex. While out drinking, Kino is picked up by a man named Iwakura. They drunkenly go to a love hotel and he is embraced by Iwakura. But why does Kino have an erection!?