MAJOR SPOILERS!!!
Well, they technically start dating, but at the same time, they call themselves “best friends who are dating.” and they be horny asfff. They become even closer after Jaemin gets forced by his parents to attend summer school and accidentally ghosts Seungpyo. But Seungpyo goes and saves him from summer school, and they run away for a bit to stay at Seungpyo’s grandma’s house. Eventually, though, they go back and resolve things with Jaemin’s parents.
here!!! i think its not the official english translation so dont expect a perfect translation (=・ω・=)
https://springofromance.com/story/error-analysis-report/

it just gets better and better in the novel i swearrr