I don't think it's as terrible as the ratings/other comment suggest.
It manages to at least present a ... Love polygon I guess? ... In a way that isn't infuriating at the very least. From the beginning you know exactly who the Mc can't stand and who he's interested in.
But a lot of details are left up to the imagination for no reason. If they weren't important, don't mention them at all. And if they are, at least tell us what it is. This applies to several things including:
-The student's parental situation.
-The relation between MC, Art teacher, and Zac. (He calls them mister, but it says AT was his mentor, but that AT introduced him to MC, but he's MCs student, and they've shared documents etc, it mostly doesn't make sense)
- what the ex exactly did. It's heavily implied he did something terrible but it never says what.
-what the gift is. It's implied it's important, and that it took a lot for Mc to get that far, but then never says what it is
The dialogue also kinda bounces around, and that may be a translation thing, but it makes its seem very... Boxy in its construction.
Having said all of that I don't think it's horrendous. The art is decent, the storyline was at least followable, and the author didn't rely on crappy love square drama like most other stories.