Unbalance x2: After Story manga summary: Sequel to “Unbalance x2”. 25-year-old Nah Hae-Young is a high school teacher. She’s pretty popular and well-received by her students, but she has one huge secret… She’s actually in a relationship with one of her students, Myung Jin-Ho! This is her story of trying to navigate her life without allowing too many stirrups from her young lustful boyfriend! 5826t
Note: This series is a loose adaption/spin-off of the “Unbalance x2” manga with a simplified & rewritten plot for webtoon format. It's not actually a direct sequel, despite the series name.
50 Chapters (Complete)

I consider the prequel "Unbalance x 2" as one of the best manhwa ever made in of story development and entertainment. So when I discovered the existence of this sequel I was very excited because there were many unfinished questions about the prequel that I wanted to see. However, my excitement waned in the first few chapters.
Unlike the original prequel, this sequel isn't worth it. Among the negative things I can mention are the following:
1- Poor continuation with respect to the end of the prequel.
it even looks like the final events never happened.
2- Personality change of the main male character.
While he was always a pervert, in this sequel he seems like a predator.
3- Facts that were already solved in the prequel are repeated.
For example: the feelings between the protagonist's friend. Almost at the end there is something new, but with a very bad development. In the prequel each arc is well developed in such a way that it left you with the intrigue to continue reading.
4- finish without offering anything new, which makes you think it was a waste of time.
The only thing that is good is the artistic style, the characters look very good, however it is not enough to consider a worthy sequel.
My recommendation, don't waste your time.
I disagree with the description that this one is not a direct sequel. In chapter 3, Cha Young-gi refers to a summer vacation which in South Korea is during a school year and that Nah Hae-Young reinstated to her school. In chapter 6, Ha Ji-soo mentions that Myung Jin-ho and Nah Hae-young went to England together which is in the last chapter of the prequel.
... Last updated 6 years ago
Pretty dissapointed. I was expecting the relationship to continue after the conclusion of the first manga, but the new author is just rehashing old chapters and reusing old plots. It's especially frustrating when those arcs have already been resolved in the first book.
Ch 10 started to show signs of change, but I'm not holding my breath.
The art is nice, so if you wanted to see sensei again, skim through.