Isn't that actually Reimu x Son of Heaven? Hm, I can't remember if 子 means son or child, but given the context, it should refer to the concept of the Son of Heaven.
Little One isn't a selfish yukkuri, it's because... it's because Little One wants to see Mommy's smileThat's why... that's why...Sorry Little One. Daddy accused you wrongly DAZE. Actually Daddy is the selfish yukkuri that only cares about herselfViruses Take It EasyBut the little ones don't need to worry. If Daddy gets serious, I can definitely carry the little ones and Mister Bananas safely to our easy PLACE DAZE.Wuuuuuuuu~