Nakyum only thought about Inhun because he was comparing.

I see lots of readers concluding that Nakyum is still in love with Inhun because of that scene.
However, look at the sequence of the scene.

Seungho hugs Nakyum and he thinks : 'It's warm'. Obviously he is not talking about being hot, he is talking about comfort, care, feeling of being cherished.

What does this say to us? That Nakyum is feeling good being hugged by Seungho. Either he feels protected or he feels Seungho care despite his asshole attitude.

Then Nakyum recalls Inhun embrace. He is not remembering Inhun because he misses him, he is comparing the feeling of the embrace by instinct.

Nakyum is starting to compare his feelings for Seungho with what he felt for Inhun and vice versa.

The key to this scene is Nakyum thinking that Seungho's embrace feels 'warm' because that means care.
We know Inhun never felt anything for Nakyum, attraction or care so his embrace would probably not feel warm to Nakyum.
The scene is there to show Nakyum comparing warmth from Seungho's hug to the coldness/false sense of care from Inhun's embrace.