Tetsuya has a miserable job at an exploitative company, but there’s always been one bright spot in his life: His beloved housecat, Tama. Imagine his surprise when he comes home from work one day to find that Tama has suddenly grown to an absolutely gigantic size! The world of adventuring has always been off-limits to a normal businessman like Tetsuya, but Tama swiftly leads him to a nearby dungeon and effortlessly takes down the boss. From racing around at high speed while carrying his owner, to granting empowering buffs just by purring, it seems that the newly huge Tama has some equally outsized powers! Plus, when the two of them save a beautiful young streamer, their dungeon-clearing livestreams go viral. Now everyone has their eyes on this adorable and incredibly powerful housecat!