My Adopted Sister is Actually a Saintess

In the universe, a girl in a blue dress, her face flushed, sits side-by-side with a girl in white on a ribbon formed by flowing starlight. "At the end of the immortal path, who stands at the peak? One...one encounter with Xuanji...the Dao...the Dao becomes empty~" "Hmm, not bad, continue." "At the peak of immortality, amidst pride...with Xuanji, there is heaven~" "Again~" "Hands...hands grasping the sun and moon, plucking stars...the world...there is no one like me~" "Very good, very spirited, next line." "Not for becoming an immortal, but only to wait for your return in the mortal world~" "And what else?" "Sister...sister, please...please don't bully me anymore~" Simple sister-raising, ultimate enjoyment. —————— [Female protagonist story, lighthearted, definitely not getting married] This book is also known as [My Socially Anxious Sister], [My Sister's Unwilling Obsession]