Most unfortunate mob character isekai get reborn or transported into another world with a cheat power. But convenience store worker Kairo Packer wasn't given this commoner's fate. 

For this average young adult with a mundane life and attitude, he never expected his passion and purchase for antique furniture would thrust him chaotically into another world. 
 
Landing on the lap of a Demon Prince starts his coming-of-age, subversive slow-burn isekai and romance experience, where his "mundane" nature is the most powerful weapon in a world of high magic. 

To survive the Palace of Princes, this blank-slate worker must trade his price tags for a hockey stick turned Zeus and level up his Rezenens Mage powers before his two worlds collide.