Konoha: This Is Definitely Not a Genjutsu

In his previous life, he was a programmer and became the eldest son of the doomed Kurama clan. Fortunately, he awakened to the five-sense control of the family's bloodline boundary just after time travel. After discovering that he had no system, he suddenly had a whim and used programming methods to combine the sealing technique and the family's bloodline boundary to create an auxiliary system that could help in combat and training. From then on, he no longer needed to form seals. As long as he gave instructions to the system in his mind, the system could control chakra to perform ninjutsu on its own. It can also create phantom beasts with five attributes through the copy subsystem, which can absorb natural energy and use ninjutsu to fight, and the body can switch between reality and virtuality at will. From then on, Kurama Yuye embarked on a path of striving to improve the system and let the system be responsible for practicing combat. ... When a huge fire dragon swooped over, passed through his body like a phantom, and appeared behind him, Shimura Danzo raised his head and asked Kurama Oya in confusion: "Is this an illusion?... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.