I think the idea of this manhwa is exactly that Hyun was always told he shouldn't have things only for "pleasure" (he even remembers the sweets when Ivan asks him why he's so against one night stands and the likes). He comes from the owl tribe, where "family" and "love" are very important. So only now he will learn that, while love and family are still important, he is entitled to have relationships only for the sake of "feeling good", without strings attached. Buuut it will probably take him a while to shake the guilty feeling for accepting that (as we can see when he thinks "why do I feel like I did something bad?")
Yes, I agree based your explanation. That's why the title is devil's temptation! I hope he'll get both love and sex!
Pursuing one person is not the dirty promiscuity Hen accused of Ivan of tho
He told the other guy that having a shallow relationship won't amount to anything. But he then goes on to want to continue to see a white haired guy who told him specifically that all he wants is no strings attached? Talk about hypocrisy.