Due to an accident, He Xiuyuan ends up in a world of cultivation. But here, immortals remain hidden from the world, and cultivators are lofty and elusive, vanishing without a trace.

In his pursuit of immortal traces and his quest for the Dao, He Xiuyuan encounters all manner of spirits, monsters, and ghosts—each begging him for a touch of enlightenment.

As time passes, and He Xiuyuan looks back, he realizes—he was the immortal all along.

Forty-two years before the Battle of Yavin, Kurt Vizra, a time traveler, stumbled upon the Hyperion while scavenging. This occurred during the Mandalorian Civil War. To survive, he sought refuge with his cousin, Duchess Satine. Before the Replicant Wars, he was a notorious space pirate; during the Replicant Wars, he was the Wings of Liberty, bringing freedom to the Outer Rings; and during the Empire's reign, he was the Empire's greatest and most notorious traitor.

This book is also known as "Uncle, I'll Help You Fight the Holy Grail War, with Meals?", "This Mapo Priest Is a Little Different", and "There's Something Wrong with This Illya".... Huh? How did I suddenly travel through time while taking a nap? And become Illya? While becoming a loli isn't a big deal, why do we still have to fight the Holy Grail War? And what exactly is the Holy Grail War? Can someone please tell me! "I'm a participant in this Holy Grail War, your Master, Kotomine Kirei. Please tell me your real name, Assassin," the seemingly respectable priest in front of me asked. Although she didn't understand what was going on, the little girl still responded politely: "Hello... Hello, my name is Illyasviel... By the way, uncle... do you provide meals here?" - In short, it's the story of Father Mapo summoning the assassin class Illya~ a well-behaved (and scheming) Illya who strives to help her Master~ (If you're not good at this introduction, please move on to the main text.) (Plot line: Fourth Holy Grail War - Fifth Holy Grail War - Magical Girl Illya, etc....)