The framing of the last few panels is super weird. Like, they’re having a conversation, not making out. I like his body language though. Clearly unbothered, just “what? What do you want?”. He know’s he’s not doing anything wrong.
I think the difference between this dude and most dense mc’s is that this guy has actual self-confidence. He knows who he is and what he’s about, and his density is mostly a result of him being hyperfocused on his goals (beating the fmc3, fumi-tan) and not caring about much outside of that, rather than the usual pseudo-brain-damage or the “there’s no way anyone could be interested in me” whinging.