The Dangerous Convenience Store Vol. 1 (manga)

Yeo Eui-joon needs cash, so he works part-time at a convenience store - where the clientele includes hoodlums and mobsters. He's tired of being yelled at while ringing up booze and trying to talk his way out of extortion, but he's not tired of seeing a certain good-looking gangster walk in the door. Gunwoo is huge, gruff, and intimidating at first...

but he seems to care about Eui-joon's well-being, and is quick to knock aside anyone giving Eui-joon a hard time. After Eui-joon gets a peek at the enormous condom size Gunwoo buys, a little spark of attraction might just grow into a big, fiery love story!