Ippou Sono Koro

Kuroishi is the Machida branch leader of Evil Guys Inc., the enemy of magical girls everywhere. But despite being a villain boss, he is a man of principles. And according to rumor, there's a side to him that's both adorable and sexy. So when Kuroishi finds out that he and Akaya, his handsome, dependable technician are locked in a room and their only way out is to get it on, what is he to do?!

(Source: MangaPlaza)

Note: Contains the extra "Karera wa Shigoto wo Mattoushimashita" (彼らは仕事を全うしました).