Naruto: From the Start, Sign-In to the Mangekyō Sharingan

[Hokage + System + Sign-In + Invincible + Multiple Heroines] Lin Kai was an ordinary young man of the twenty-first century. One day, he stayed up all night gaming and died suddenly, only to transmigrate to the Hokage world. The Second Shinobi World War had just broken out. After transmigrating, Lin Kai also received his own sign-in System. With his very first sign-in, Lin Kai obtained the Mangekyō Sharingan and made a spectacular name for himself in the war. Many famous ninja had this to say: Hanzo of the Salamander: “I thought the Sannin were Konoha's strongest, but I never imagined someone like you existed!” Danzo: “What a powerful Sharingan. I want it so badly!” Tsunade: “Thank you, Lin Kai, for saving my younger brother. I can only repay such a great kindness by giving myself to you!” Hatake Sakumo: “If you're going to have a son, let him be like Lin Kai!” Jiraiya: “I've spent my whole life following in Lin Kai's footsteps!” Orochimaru: “Lin Kai's body is perfect!” Minato Namikaze: “Lin Kai's speed is truly enviable!” The Third Hokage: “Lin Kai, how about you become the Fourth Hokage?”