In a large city, in apartment no. 308, surrounded by computers, plush toys, jars of Dr. Pepper and sweets, lives a sweet girl named Yuuko. She is a NEET—a person who neither studies nor works, in other words, a shut‑in. It cannot be said that she does nothing at all; taking the pseudonym "Alice," in her own apartment she opened a detective agency and began conducting investigations without leaving home. She is assisted by Narumi Fujisima—a boy whom Alice hired as her assistant. He scours the city, searching for evidence, arranging surveillance and interviewing witnesses, while his boss finds the necessary information on the internet, builds logical chains, and arrives at deductive conclusions. The series will tell the story of how Alice and Narumi became entangled in a dangerous plot involving the drug "Angel"s Clamps."