Allure of Sins

What happens when the seven deadly sins bet against each other?
Charming Eden is caught unawares in a sibling rivalry that has lasted eons. She is supposed to help Leon win some kind of bet, but until it starts she gets to stay in a fabulous mansion with the original sins themselves. Eden doesn't understand what tests she must pass. As each day passes she gets closer to the end of the game and farther from the life she once knew. After all, humans can only survive so long in Hell.