MTL - Urban Young Fairy - Chapter 2577 Only 1 dare to be the enemy

A man is reborn into the world of Avatar: The Last Air Bender as a waterbender from Katara's tribe. Best of all, he was the same age as her, and he had a system with him to help.He knows the future and a system that lets him continuously get stronger by completing quests or long-term missions, as well as giving him the ability to copy abilities from others for himself. He will become invincible in the world of Avatar, even more so than the Avatar himself.

A boy from 21st century Earth, met an accident and later was reborn in Naruto’s Ninja World.
He is born in Uchiha Family and becomes the useless brother of Itachi Uchiha and Sasuke Uchiha…. Let’s see how he changed the Naruto world.

- Description from Novelupdates

When I opened my eyes, I found my soul synced into the popular dating sim game, ‘Midnight’! And although I was clearly one of the female protagonists, I possessed the body of Evenes Harin, the saint who is treated like a trivial extra. What’s worse is that I must pursue one of the five male love interests and see it through to a happy ending in order to complete the game.

Having attended the triple combo of an all-girls middle school, high school, and university wasn’t enough of a debuff, having unintentionally put up an iron defense, I’ve been in ‘forever alone’ mode for 25 years. On top of that, I’ve possessed the Saint seldom played due to her atrociously difficult route! This life is screwed up, and I’m sure of it.