Ore ga Abnormal Kamoshirenai Ken ni Tsuite

Yuki Kazushi just got dumped.
He found out that his ex-girlfriend has been cheating on him by accidentally finding her with another guy out in public. Why did she cheat on him? Apparently, his sex is boring to her.
After this depressing event, his friend tries to cheer him up by recommending him into the porno business that he created. Now, Kazushi is starting to find that maybe the porno business is his true calling?!
(Source: MangaHelpers)