Chuuya Nakahara, a Port Mafia executive, is known for his fierce reputation and quick temper. Despite his tough exterior, he has a soft spot for animals, especially dogs. One night, he finds a stray kitten and brings it home. He names the kitten Anon and finds his life changing as he cares for his new feline companion. He balances his dangerous work life with his unexpected role as a cat owner, greeting and bidding farewell to Anon each day. One day, he returns home to find Anon missing and calls out worriedly for his pet.