Adaptation from the light novel of the same name-a heartfelt series that revolves around a student who happens to intrude upon a NEET detective and became her assistant. Narumi is an assistant to detective Alice, a NEET teenage girl who stays in her pajamas and operates within her bedroom. She uses her vast network of people and the internet to solve cases
(from my anime list)
Narumi Fujishima is a plain high school boy, who has been isolated in the class. His classmate, Ayaka Shinozaki, invites Narumi to the gardening club and introduces a hikikomori detective named Alice to him.
Alice hires Narumi as an assistant to solve mysterious cases involving an illegal drug "Angel Fix". But the drug entraps Ayaka into danger.