I Am the Big Shopkeeper.

Travel through time and become a big shopkeeper, with a clear picture and a pile of IOUs! The expected system made me turn into a debt collection baby, but every old guy who didn't pay his debts was a famous and powerful person, and the host could be discovered or eliminated at any time. In order to recover the assets as soon as possible, become bigger and stronger, dominate the world, and be the only one, the host has to give up himself, be extremely evil, and do anything, just to make the world a bright and prosperous world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.