[Hizumi takes the opportunity to set the mug on the nightstand by his bed, using it much the same way as Ayumu did with his own; an excuse to look away.]

...We can still stay. There's nothin' stoppin' us. Time won't move on as long as we're here, and 'sides, even from Rutherford's point of view...

All that already happened.

[He neglects to mention exactly what he means by "that," but neither of them really need the reminder right now of all times.]

It won't affect anything so long as we're here.

[So why not take advantage of it...?]