The first time they try, it's awkward. It's clumsy, it's- it's what they would consider okay and well beyond their expectations, but it's only that. It can only be considered as something unique to them, something that neither will forget for as long as Erro exists, and even when everyone is returned home and there is nothing left of the three girls or the town they were left to rule.
There's fumbling- fumbling with buttons, fumbling with shirts, doors, locks, clasps, pants, beds, sheets, fumbling with words, kisses- even emotions are tumbling over themselves in the moment.
A pause. It's not as if there's any turning back at this point, but there's still the chance to not go ahead. Neither knows what will happen, or what the other will even say about all of this, but it's obvious that they need to be sure nothing negative happens. No attacks, no coughing up blood.
Just-
Even if things are not perfect for them, they don't want it the memory to go to waste. They want something to remember, a thought they'll always have to hold on to, long after they've lost each other.