madonna wa glass case no naka

Manga by Suguwara Esuko
("Madonna in a Glass Case")

Yuya Yamamoto (32 years old) works in a pet shop specializing in reptiles. He's a bit of a reptile fetishist. Although he has no luck with women, he manages to remain fairly happy. Suddenly when a beautiful girl shows up wanting to buy a gecko, his life changes ... !?

Description on J-Nbooks.jp (Japanese)