When Naruto Started Cultivating Immortality

[With heroine] + [Naruto] + [Urban Cultivation] + [Fan] + [Parallel Universe] (Reference: "Naruto the Movie: Road to the Ninja" Uzumaki Menma, Namikaze Menma, playboy Sasuke, Taimei Hinata, etc.) + ([No time travel] [No system] [No rebirth]) In Otogakure City in the Tsukuyomi world, Kabuto Yakushi is deeply involved in dangerous cell experiments, and is suffering from physical mutations and the collapse of his self-cognition. When Orochimaru, who had disappeared for seven years, suddenly returned with the secret of cultivating immortality from another world, everything quietly changed. The incomplete method of cultivating immortals, the prototype of artificial spiritual roots, the breakthrough of curse seal crystal... Can Kabuto Yakushi, who is involved in the brink of the Ninja World War, find his own path at the intersection of science, ninjutsu and cultivating immortals? And what kind of future does the seed buried deep in the "rotten soil" predict for him during the spiritual root test?