Double: The Devourers [Isekai Progression Fantasy]

Sun is an adventurer who peaked too soon, his below average body holding him back. Hana is a girl who failed school, not because she wasn't hard-working, but because her mind just couldn't keep up. They were very different sorrows, but the Abyss didn't discriminate between their despair. It killed them both, beckoning them to their deaths, and reformed their bodies with power only it could bestow. Now, with their new forms gifted to them by the Abyss, what were they capable of? And whose capabilities would they take? *MCs start out OP, but only because their enemies will be too.