I mean, can we call that he fell in love? Because i thought he's just trying to make a plan before and I really thought that those feelings are just temporary, especially he really didn't want to be with the top at the first place after all. But yeah, i think there's no Stockholm here but still.. idk anymore. ಠ ೧ ಠ
you’re right, i’m pretty sure the whole plot was that he WAS just faking his feelings to fool the ml and then try kill him, but he eventually ended up ACTUALLY falling for him.
i don’t know if it can be defined as love, but it was definitely more than just a crush, so i guess we can call it love, thus no stockholm syndrome.

WAHHHH, CAN'T THIS TOP JUST SUFFER OR WHAT?????? THAT LAST PANEL REALLY SHOCKED ME, IS IT GOING TO STOCKHOLM SYNDROME BECAUSE IF YES, I AM GOING TO DROP THIS, I JUST WANT THEM TO DIE BOTH AND THEN REINCARNATE IN A MODERN WORLD, THIS IS INSANE! ¯_ಠ_ಠ_/¯