Naruto: Otsutsuki Yuexin

An ordinary high school student transmigrates into the Ōtsutsuki Clan in the Naruto world. But unlike the predecessors, he does not become part of the main family. Instead, like Ōtsutsuki Kaguya, he is a servant.

At last, when the clan holds a selection to choose who will go to the Shinobi World to capture Ōtsutsuki Kaguya, he volunteers and is luckily chosen. He then uses his knowledge of the future to befriend the people of the Shinobi World and join them in resisting the invading Ōtsutsuki Clan.