i also confused to describe their character, and i think this is the correct answer
I am not aware of symptoms of autism spectrum since it's nothing I face irl so I typed them as ESFP x ISTP
Male ESFP is one of the rarest characters in media and he seemed to fit right in but I didn't consider autism as part of his personality traits
As for the bottom, he seemed pretty down to earth, worked for money since no family, very tolerant towards the younger guy and open to new experiences (chest strap reaction). Older ISTPs are a lot less hot headed and just live life so I thought they were normal but at this point idc (story ended)
ESFPs are creatures I only observe and never interact because too much energy
Think seme is more like AUDHD if anything, he seems like hyperactive adhd which i felt moreso than autism to be honest (as someone with both) but i could see it being both idk
they're like two spectrum of autism