Torikagosou no Kyou mo Nemutai Juunin-tachi

is a Japanese light novel series written by Yukako Kabei, with illustrations by Samata Techno. The series began publication on November 10, 2006 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Weird people live in the "Hotel Williams Childbird", commonly known as "Torigoso". Delusional beauty, Gothic Lolita elementary school students, cat costumes, eerie twin old men, etc.

One of the residents, Kizuna Eto, met Yusei Asai, a hikikomori beauty college student who lives on the 5th floor, in the winter of 16 years old. Invited by a part-time job of a nude model in the picture, and--.

Manga
The manga adaptation of the light novel: with art by Rihito Takarai. It was serialised in Comic Sylph and released under the Sylph Comics imprint from November 2008.