I Have a Pawnshop Exchange System

After the protagonist was reborn, he was actually parasitized by a strange thing! And this thing claims to be a pawnshop exchange system! "Anything we accept in pawn is worth ten to five." "Do you accept your moral integrity?" "Take it." From then on, the protagonist becomes a pawnshop owner who collects everything and does everything wrong, pawning items systematically and harvesting various elixirs, exercises and... Girls. Live a life that no one will envy. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.