Ren and Rio, passionate cosplay fans, are transported to another world where their costumes define their fate. Summoned as servants in an opulent mansion, they are warned to maintain their roles in front of mysterious "players" who populate this world, or face serious consequences. As they explore this new realm, they uncover secrets about the system controlling them and the true nature of the threats they face. Ren and Rio struggle to preserve their freedom, their humanity, and the bond that unites them, in an adventure where love, survival, and mystery are tightly intertwined.