Summary
Park Do-Kwon, the protagonist, returned to school in Seoul as a native. Girls from the rural provinces start to gather around him to learn the 'Seoul dialect'. "They said students from Seoul are known for having sex." These girls seem to have some misunderstanding about Seoul!"

https://omegascans.org/series/seoul-kids-these-days

I recommend reading the manhwa on PC using Yomikiru, and on Android using Tachiyomi.

Hm... Not exactly a good translation.
Not only did they translate the different dialects exactly the same, they didn't even bother to use a typographical distinction between the two.

Base +7

For anyone starting from chapter 19: https://e-hentai.org/s/6447e0b218/2736813-182

Base +5