it depends on how you describe the kiss I think. I'm trying to go the Nicholas route too. Did your gameplay rule him out as a suspect? If not, how did you describe the kiss?
ACTUALLY it ruled both samuel and nicholas out that i had to reset my whole game. i didn't know it was based on the kiss? does that mean i have to kiss them and not be kissed??? because samuel and nicholas doesn't seem the type to kiss the player first.
ps. i choose to be kissed and gave the kiss 10/10 and i got suho, lucas and marc as my suspects.