Kono Danshi, Mahou ga Oshigoto Desu.

Chiharu Kashima is the captain of the Wizard Bureau's Crisis Countermeasures Division. One day, he meets a friendly man named Toyohi Utsumi at the bar he frequents. Soon after the meeting, Utsumi confesses, "I've fallen in love with Kashima-san." Kashima is taken aback, but the two soon begin to spend more time together.