Airy, fluffy dough always dries out quickly. There is only so much you can do about that.
Having said that, a Tangzhong/Yudane helps a lot with slowing down the retrogradation of starch.
There also are all sorts of commercial dough enhancers that purport to address retrogradation, but they are frequently not available to home bakers and they tend to have other effects on the dough which might be undesirable.
Another option would be to heat up the rolls right before eating them. You can even spray them with water first before doing so. Heat can temporarily alleviate retrogradation, but that's only a short-term fix and you can usually only do so once. Storing the rolls in the freezer is another option to delay the staling process. It doesn't extend the usable life indefinitely, but it can certainly get you a few weeks.