These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Faeries Landing
Abandon Shipping: The reveal that Fanta was only using Ryang in order to discover what happened to her father caused some fans to jump off that ship and onto the Ryang/Yusin one, especially after her return in the later volumes.
Evil Is Sexy: Yuri and Oreadia, who are both undoubtedly some of the most attractive female characters in the series.
Foe Yay: Ryang and Yuri (the enemy thing is one-sided) , who even end up sharing a kiss on the trip to Sokcho.