Himeno-kun wa Tokimekitai
姫野くんはときめきたい · ひめのくん わ ときめきたい
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Himeno Yui, the oddball of the class, finds his “shounen manga artist who's on the edge of the cliff” side exposed by the class prince, Ouji Hinata! Meanwhile, Ouji harbors a secret of his own: he is a devoted “shoujo manga lover.” Tensions rise as Himeno teases him about romantic relationships. However, when the editor who works with Hinata suggests that he try writing shoujo manga, he decides to take the plunge and shouts to Ouji, “Teach me shoujo manga!” From that day on, the two opposites embark on a secret journey of “heart flutter lessons,” exploring their different worlds and the budding connection between them! (Source: Shodensha, translated) Note: Includes one extra chapter.
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections