Naruto: I'm in Konoha, and Tsunade Knocks on My Door at Midnight

I transmigrated into Konoha and became an orphan whose parents had died in the Third Shinobi World War. Someone had even swindled me out of my parents' compensation money.

Just as Long Kongteng Yu was feeling down, Tsunade came knocking in the middle of the night. The moment he opened the door, she threw her arms around him.

Then, crying her eyes out, she insisted on taking him in as her little brother. The reason? He looked just like Nawaki.

With Tsunade as his big sister, he graduated from the Ninja Academy alongside the Konoha 12 without a care in the world, then joined Kurenai Yuhi's Team 8.

After the Third died, he threw his full support behind his big sis Tsunade as the Fifth Hokage and swept across the entire shinobi world!