I just really wanna cuddle Tendou and Semi? Imagine spending a snowy winter night wrapped up with the both of them. You get to make hot chocolate with Tendou has to have so many personal recipes for them. Semi probably has a playlists curated to specific vibes so there is definitely something for winter.
An configuration of cuddling is fun as well? Are you in Tendou's lap or the little spoon? What about being his likely shorter jet pack? Do you want to wedge Semi in the middle so you can both leech his body heat? Or! What about you in the middle so you get to be the toastiest?
A fun way to spend the evening on the couch though would be sitting in Tendou's lap with Semi's head resting in yours. Everyone can have hands on everyone while you watch anything from the snow falling to something on TV or just talking.