The Kakarot Fantasy Scam

After transmigrating to another world, he has a System, belongs to a fallen clan, has a younger sister and a blood feud, and bears the buff of an obsession with a “three-year promise.”

Everything about this looks like the classic story of a dragon among men rising to power in another world, doesn't it? Wait, what?!

What do you mean the System left me a compensation gift pack and a status panel at the start, then ran off...?

And what do you mean this world is too complicated for the System to handle, so I should fend for myself?

After merging souls with the original owner, his obsession nags him day after day like an alarm clock, demanding his life over and over. He finally makes it out of the forest alive...

Wait, wasn't this supposed to be a medieval fantasy world?

What do you mean the Academy of Magical Sciences has completed tests on its newly developed anti-void weapons?!

What do you mean the great Demigod Emperor Rokalda might be a transmigrator from another world, and is currently in the middle of ascending to godhood?!

Every adventurers' guild on the continent of Kakarode has a device for testing soul compatibility... Uh...