Japanese title: こちら秘封探偵事務所
Illustrations from a web serialization by fanfic writer Asagihara_Shinobu_(Rhythm_Five) involving Usami Renko and Maribel Hearn in Gensokyo.
Serialization in Japanese at http://longnovel.com/touhou001/
Serialization in English at http://longnovel.com/touhou008/
