Osomatsu had always liked dismissing responsibility and living his own life his own way, even if devils like him were created with a clear purpose: to oppose the Heavens. Either way, that doesn't stop him from accidentally forming a bond with a certain megami. Simultaneously, other major problems arises.

At one point in time, there were six of them. When things happen and only three of them are left, they flee to a church to guarantee their safety and turn to religion. It worked for years. Luckily, at that point, they were already used to dealing with the unexpected. (DeviMega AU!)