Giyu and Sanemi were both 21 and husbands (modern AU). They'd had an argument over something the hashira said. They hadn't spoken to each other for a day

Sanemi had been sick all day and had spent most of the day on the sofa. He felt like he'd be sick any moment.

Deep down he just wanted to be with Giyu but they both had a drive to prove they're correct.

Sanemi was sat on the sofa, head resting to the side. Giyu sat down as well but on the other side*