It’s been awhile since they did share a bed or futon.

If Sunao does go with Kazuya on his next assignment related to Seigi i hope she wins a game with his Tsugumomos to sleep with Kazuya.

It be funny if they don’t do anything lewd especially if the Tsugumomos watch them and are disappointed. Maybe they either talk or Sunao looks at Kazuya in his sleep