Naruto: with the Super Ninja Serum, I Can Survive in the Apocalypse

[No heroine + relaxed and joyful + plot flow + happy survival] The fifth ninja war began, and the entire ninja world fell into a critical situation. Otsutsuki Kaguya led the strengthened White Zetsu army back to the ninja world and defeated the ninja coalition. Konoha Village has become the last frontier of mankind. In desperation, Konoha's top management decided to agree to Orochimaru's super-nin serum experiment. Uzumaki Yasumi participated in Orochimaru's experiment in order to get the 10 million participants. However, the survival rate of the experiment was almost zero, and Orochimaru hid this from everyone. Yasuaki Uzumaki only knew about this a second before the experiment started, but it didn't help. The super-nin serum was injected into his body. When he woke up, Uzumaki Yasumi found that he was not dead yet. His body unexpectedly adapted to the Super Ninja Serum, and even awakened the Super Ninja System, allowing him to automatically learn Ninjutsu! Uzumaki Yasumi didn't know what was going on in the outside world. Just leave this laboratory, return to Konoha, find Orochimaru and take away 10 million!