My Sister Is Unparalleled in Beauty

[Older Sisters + Decisive and Ruthless + Invincible + Miracle Doctor + Pure Wish Fulfillment] Fifteen years ago, I was abducted by a mysterious organization and rescued by the Dragon King Hall... But I lost my memories, and then I disappeared for fifteen years. Over those fifteen years, my seven older sisters each excelled in their own fields. As for me, I became the overlord of the borderlands, a king who made people tremble.