Differences in common knowledge can not stop you from love in this Yaoi Manga Recommendation.
Today’s Yaoi Addiction Society’s Yaoi Manga of The day is Koi no Hajime
From Yaoi Is Life:
The recent newcomer at Naitou’s work is none other than Tsutsui, who despite being a University student, is also the son of a famous rich man.
Naitou realized how different their common knowledge was as he saw Tsutsui struggling with cleaning material, and greeting the customers as if it was a high-class store. However, against all odds, he embraced the good impression that the hard-working, serious Tsutsui had left on him.
Even so, as Tsutsui tried treating Naitou to dinner and offering him things to become his friend, circumstances caused a mood of servility to sprout between them.
Also included, the love story of Tsutsui’s butler, Fujiki.
Summary from https://www.mangaupdates.com/series.html?id=104798