Responses
I am sure it was almost the end of summer. The last time we saw the outside, it wasn't obviously winter, and if it was spring there would be a lot of festivals and knowing Aki, he would have participate with Asami, so the end of Summer is what I thing is the most logical season.
Probably summer - Aki out in just underwear, Asami in a t-shirt ...
Did we have some sort of hint on what season it was before the time skip? Because they mentioned it's autumn, I'd be curious to figure out approximately how many months passed by (=・ω・=)