
I'm a person who finds age gaps very icky and a big turn off so i take this matter seriously and did the math. This is just my assumption but going by the facts we alrady know:
Blondie is a 31yo highschool art teacher and the
ex student is now in college as it's revealed in coversation in chap 9. Then i chap 10, he asks her if 6 years ago she worked in jinja highschool
Hyun bin was in her 3rd grade class. I think it could have been translated better, but it means he was a senior in highschool (as in Korea highschool is only 3 years).
Also going by the fact that she is in denial and thinks he is only interested in her bcz he supossedly wants to ask her about the teaching exam preparations, that could mean he is almost about to graduate college. But this last bit could be a stretch
So doing the math, present day he should be around 24yo. As they met when he was 18/19 (korean age) yo and 6 years have gone by.. Meanwhile she is 31 yo
So...
They have a 6/7ish age gap
Fortunately I don't feel icky about their age gap and I'm praying I guessed their ages right, and he isn't freshly out of highschool.
Still he is the young and impressionable one. But i feel that their relationship will be healthy and give space for a lot of growth for both of them as they are still newbies to relationships.
A pure hearted younger guy maybe was the type of guy Seon needed

Chap 29 made me ugly cry at 3am. Damn with every chapters it gets better and better. Dare i say a masterpiece in progress, cuz what i really like and it's not commonly found on yaoi mangas is that the penetrative sex is kinda postponed until the uke is ready.
The seme controls himself and puts the well being of the uke first from his urges...which was just chef kiss. The consent in that panel was amazing

The plot is not very original as well as the characters but idk there's something that just makes you want to keep reading
However, the flashbacks of her dad's struggles being a single father really surprised me in a good way. In this genre, i hadn't seen the unglamourised depiction of what is parenthood for single fathers yet, it's usually just an addition character feature to make the ml seem more attractive
First time i like the ml but not the fl because she started giving me much 2nd hand embarrasment. But i'll try to be open minded and not judge her too quickly