I DO. I think 10 years down the line when they're 35 and 38 respectively, i think life will look basically the same, with the caveat that i think Riou wouldve adapted back into some form of regular life with Samatoki. Like not entirely normal but he lives in a house with a roof now. At this point samatoki wouldve mellowed out significantly from his 20's spunk and now is sorta like a uncle who you call a hardass but is super nice in his own way (he'll still kick ass if necessary tho)

Because of this, he and Riou don't have a standard relationship dynamic. They love eachother deeply but unless if you were direct friends and family, it would just look like they were roommates. Despite their casual approach to dating, even after 10 years they remain affectionate towards each other in ways that satisfy them. Idk MY BRAIN IS BLOWING UP. I saw an artist a month or so ago draw mtc in their 40's and i flipped the fuck out seeing them so i think about da future for them a lot. Thank you for asking YAY!!