Synopsis
Takumi Tsuzuki is a free-of-charge student at Umenomori Private Academy, alongside his childhood friend Fumino Serizawa, whose words always contradict her true feelings. At school, he spends much of his time dodging Chise Umenomori, the board chairman's pampered granddaughter, who constantly drags him into her quirky hobbies. After classes, he heads to the "Stray Cats" confectionery, a cake shop run by his adoptive older sister, Otome Tsuzuki, and works until bedtime. That is Takumi's usual daily routine. Mayoi Neko Overrun picks up with another seemingly ordinary day for Takumi. With his sister away from the shop—having gone off to rescue someone else in need—Fumino takes it upon herself to wake him up so they won't be late for their usual walk to school, inadvertently giving him a glimpse of her blue-and-white striped panties. A nice way to start the morning. When Otome returns home, she brings along a girl named Nozomi Kiriya, whose hair and mannerisms strongly resemble a large cat. It turns out she is a runaway whom Otome cannot help but take in. Takumi's ordinary days erupt into splendid chaos as he tries to uncover who this mysterious beauty is and what she is fleeing from.