No, there isn't more than that, side chapter 12 is actually the last one. I think the "to be continued" was simply a mistake by the translator/s... Back then I also saw the original (Korean) chapter and I can confirm it said "the end"
i couldn't be the only one reminiscing that feeling of getting closer to your crush during your first relationship. damn you heesu and seungwon you make my heart flutters so much and now I just want to go back to high school again
I'm over halfway through and can't take it anymore: what chap is the misunderstanding gonna be cleared?
nvm i finished it anyway that moment was so hilarious i laughed my ass off it was so dumb tho but their reconciliation was really sweet