Aodhan

Kangwoo has someone better, insecure people are energy vampires, let that little white haired punk suck someone else dry with his neediness

I'm very particular about honesty (ENFP/INFP, we're all about authenticity, truth, justice, etc) and yet I'm not sure about how bad this actually is.

He definitely tried to deceive Hojun. He pretended to be motivated by a desire to help others, when he was motivated by what-- wanting to get laid? What was his point with this deception again? He pretended to be an unofficial teacher as a side-job,

...and then he unofficially taught someone... as a side job. People who actually want to pursue a career lie all the time about their experience in order to get hired, otherwise they'd be unable to get experience because no one wants to hire someone inexperienced.

As a result of Ahn's teaching, Hojun truly has become a better lover. Instead of teaching Hojun only what Ahn likes, Ahn taught him principles that he can use with anyone he dates from now on.

That's why this doesn't feel like a scam, no matter what his initial motivations were. He actually provided the service he advertised. If I were Hojun and he explained everything to me, I wouldn't break it off with him. I'd be disappointed that he'd been the kind of person to be so dishonest, and I'd express that my trust in him has lowered for obvious reasons. And yet I can't find anything else to be upset about. There's no actual damage happening here. Nothing in Hojun or Ahn's life has been threatened or made worse by this deception.