if senku and co weren't there stan would have had xeno pinned to the wall of that cave scenting him until xeno only smelled like him and wouldn't let them leave without xeno having a brand new mating mark on his neck
stanxeno reunion but omegaverse with stan caressing xeno's neck instead right where xeno's healed claim mark is that stan desperately wants to sink his fangs into so he can reclaim his omega again