OMG!

Kang Yohan, plagued by endless misfortune, turns to the supernatural to change his luck. Too broke for a proper summoning ritual, he settles for a ""Do it Yourself"" version and ends up with Chung—a so-called ""cost-effective"" god.But life doesn’t come cheap. Yohan is about to learn two hard truths: you get what you pay for, and nothing comes without a price. Now, he must fulfill Chung’s bizarre conditions to finally escape his cursed fate!
(Source: Lezhin US)
Note: Part of Blühen's Hageukasang (하극상) Short Story Collection or Downfall Collection in English.