Summary
Soul, a regular man, is suddenly transported to a strange fantasy world while wearing only pajamas. Unlike other people summoned into this world, Soul doesn’t receive a status window—a system that normally grants powers or information to new arrivals. Instead, he’s hit with a mysterious system error, making him seemingly powerless and vulnerable.
But Soul isn’t alone—his pet rat, who came with him, suddenly transforms into a handsome humanoid beastman named Rio. Even more shocking: Rio is not just sentient—he’s an S-Class Awakened, one of the strongest beings in the world.
Rio quickly develops a deep attachment to Soul, referring to him as his master and expressing romantic (and sometimes very clingy) affection. Despite the bizarre situation, Soul has no choice but to rely on Rio for survival.