The World's most Overpowered Side-Character

Sol Vestic was once a hero summoned by the Goddess to save her fading world. He battled for years in a war against the forces of darkness, ultimately standing as the lone survivor from both factions after vanquishing the Demon-God. After destroying the enemy, the Goddess descended to the physical plain, and Sol, having endured horrors beyond hell, is rewarded. Captivated by his strength, the Goddess Ikaris binds herself to him in a slave pact, a pact he finds acceptable for all he desires after that much death is rest while her only desire is to serve him. That was supposed to be the end, but they both got summoned again to another world almost as soon as they returned to his own. This time around, Sol refuses to become anyone's hero. Instead, in his quest for rest he chooses to challenge the pantheon of gods and become the strongest being in existence while living as a misunderstood man, carried by his slave who took his place as hero, battles await, secrets start to scurry into the light when the world as he knew it begins expanding beyond the visible horizons of reality and deep into the fringes of eternal darkness. Terrible consequences lay beyond the borders of the known.