Hah, I knew it! Shou's been sleeping around the entire time. (Expected this ever since I read Kawaii Akuma) Most of Sensei's stories feature slutty semes and innocent/sweet ukes. I guess abstinence is impossible for those who say they're in love, but not for those who are their unrequited love, like Itoshi no Nekokke or Complex. Substitutes are needed for their lust right? No pure one-sided love virgin in this world.
Akuma Wa Hohoemu