The Unlikely Genesis of a Demon King

Prompt: Man dies protecting his girlfriend only to find out she cucked him with his killer. He then wakes up in a forest and gets almost killed by some men in leather armor with swords, he manages to escape when a giant bear with two heads shows up. He then finds a small cave where two tiny male goblins are terrified of him but bravely try to fight, the mc beats the crap out of them despite never fighting a day in his life. Leaving the knocked out goblins at the entrance he ventures in only to find 3 naked female goblins. They seem terrified but when he doesn’t immediately attack one of them tentatively presents her butt in a submissive gesture. The man in his confusion and broken heart over his ex girlfriend accepts the offer, stuffing his large dick into the small goblin. This being the moment that would birth the new demon king who would conquer the world.