Just as a warning, chapter 40 will be the last one (unless there are extras or a side story. The final chapter was released this week so I'm not sure about it). Spoilers
I can't read Korean but it's pretty obvious that it's a happy end. It also doesn't look like there was any real drama about Seunghyun not being an actual sex teacher, just a little bit of drama involving his ex but nothing major. Oh, and more steamy sex scenes with great butts.
Just as a warning, chapter 40 will be the last one (unless there are extras or a side story. The final chapter was released this week so I'm not sure about it).
Spoilers
I can't read Korean but it's pretty obvious that it's a happy end. It also doesn't look like there was any real drama about Seunghyun not being an actual sex teacher, just a little bit of drama involving his ex but nothing major. Oh, and more steamy sex scenes with great butts.