Yamada, a 35-year-old single office worker, lives an ordinary life—until he visits his late grandfather’s old house and discovers… a portal to another world!? On the other side, he meets a talking black cat and a mysterious homunculus girl. Now, Yamada begins a new life split between two worlds: – In modern Japan, he uses cheat-level magic for everyday convenience. – In the fantasy world, he enjoys a peaceful, slow life surrounded by magic and companionship. Thus begins the perfect double life of a tired salaryman—blending comfort, magic, and a bit of heartwarming fantasy!