Space, the last frontier. Or at least it was until the year 3039 when humanity discovered the rift and proved the existance of a multiverse. Those with the ability to move between universes are called wanderers.
Jack, a 23 years old otaku and gamer decides to become a wanderer dreaming of power, fortune and women. Hes a egoistical lazy pervert, that loves music and have a dark humor, so what would happen if he ended on a fantasy medieval universe, wielding superior tech, knownledge and mental powers?
Chaos, Sweet Sweet Chaos.