The Beginning

Years after Aincrad, ALO and the underworld, Kirito and Asuna take their last breaths in each others arms.

They awake in a large, white space with yui. A being of great power offers them more time together. The family of 3 accepts.

They are reborn. Asuna is an elven princess, Kirito is a daemon prince, Yui is a spirit. Kirito and Asuna are engaged. Yui finds them. While almost everyone thinks it's strange that Yui calls them mamma and papa, they write it off as spirit eccentricy. They live happily ever after.