In a world where people keep fantasy creatures as pets, Kanna Shirayuri finds an abandoned orc and begs her mom to let her keep him. An orc is a big responsibility, of course—you need to let them breed you every day so they don't get sick. Kanna insists she's up to the challenge, and after much pleading, she manages to convince her mom. But when Kanna brings home a boy for the first time, how will he feel about his girlfriend and her pet?