#2
#3
#5 of 6 in 宝石商リチャード氏の謎鑑定
#4
#1 of 3 in Associate Professor Akira Takatsuki's Conjecture (Light Novel)
#5
#2 of 3 in Associate Professor Akira Takatsuki's Conjecture (Light Novel)
#6
#6 in The Case Files of Jeweler Richard (Light Novel)
#7
#2 of 4 in Thousand Autumns: Qian Qiu (Novel)