Interi Onii-san to Toshokan Shokuin
インテリお兄さんと図書館職員 · いんてり おにいさん と としょかん しょくいん
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Hasumi the librarian has trouble expressing himself in front of others, and is secretly admiring Shiraishi, a person with an elegant smile that often comes to borrow books. Shiraishi's personality is exactly what Hasumi wants to become, but... (Source: Ichijinsha, translated)
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections