It's a projection. [ Honestly Khun doesn't see what the big deal is because it's not like they live in darkness and it's pretty realistic as far as he can tell (he has no idea sunburn exists). but he can't help but smile at tatara's excitement, it tickling some memories from the not so distant past. ]

Invitation accepted. But if you're taking me somewhere, I want the full experience. Don't forget the nap.