i guess i get what shes saying. ive read enough series were the whole crux is some childhood promise of marriage that one party never forgets lol we know the kinda guy Edo is, Mei only knows the hands that comfort/excite all women.
As someone who's allergic to a lot of glues, I immediately look at the dots on Yumika's skin and think 'She's reacting to whatever they stuck the sensors/trackers to her skin with.' Maybe they're suction-cup marks?