Debby the Corsifa wa Makezugirai

Synopsis:

"Debby the Corsifa" is a vicious demon that resides in the depths of Hell. She enjoys a good fight, but no creature in Hell can compete with her. She chooses to extinguish her boredom by eradicating humanity! But shortly after arriving on Earth, Debby runs into Rokurou Sugo, a similarly bored human, just as he can be heard wishing for a game partner. Debby challenges Rokurou right away to a battle that he has little chance of winning, much less surviving. Rokurou, fearing for his life, challenges her to a game of "Old Maid" as a safer and more effective way to pass the time. Debby reveals herself to be an airhead who is only fit for brawls, despite appearances! Debby persists until she defeats Rokurou in a game, regardless of how many times she loses.