You know, even when I didn't think about it, that's the reason why the body switch trope usually doesn't excite me? lol ...I mean, in any case, it should be more exciting to see the characters looking fascinated at a mirror than for them kissing I know the idea still is that they fall for each other's persolity since they are "forced" to spend more time together against their will trying to fix it. And the title is Inner Beauty so we're supposed to believe that, lol. But I totally get what you mean.
Now in ch 22, there's a flashback (I hope this doesn't count as a spoiler) that made me go to check the first chapters again and I realized how the author did actually a good job showing their true personalities, mannerisms and body language even when they were in each other's body. That's definitely cool...
I just read ch18 and
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I was like "at last!" about the kiss but at the same time, I do think this story is rushed . They've known for like a week and Minjae is already being somewhat dramatic about his feelings for Woochan (I'd get it if his "suffering" were bc of his ex but a week knowing someone isn't enough for him to be like "stop getting my hopes up!" idk it feels forced... I'm still enjoying a lot this webtoon tho I'm sorry, lol).