This is actually a clever angle to explore the topic with. While girls often have to shave their legs, it's easy mode compared to the face. Less nerve endings, tougher skin and it's a mostly consistent cylinder shape. The face is curved and soft/pliable and you feel pretty much every swipe. And the blood, ugh.
I like this manwha a lot so far just for flipping the script on the usual gender bender story and standing out by doing so.