Tsunade666: It's published by Dengeki Comics, so I assume it's seinen (the list at the back includes MuvLuv Alternative and Yasashi Sekai no Tsukurikatta). That said, the comic is
heavilyTankbro x Useless Meat. I can actually imagine the manga-ka "kyaaaaa"-ing in the background.
Observe:
Oh, and Haruhi, Hamelin are jerks in THIS comic too.