
I'm in no ways an expert on this issue, but for anyone who is, could Tsugumi be autistic?
This is a comedic series, but it also portrays a realistic society. In my mind it's the most realistic portrayal of an omegaverse society, where omegas have civil rights, can have decent careers and there's been no mention of destined pairs.
So I wonder, why is Tsugumi so clueless when he comes from a loving, 'normal' family and his younger sister is so perceptive. I think his issue is biological. He can read dangerous situations, but generally can't read people.