Superstar From Age 0 - Chapter 474:

“National Immortal Cultivation World” is an immortal cultivation game that once exploded on Blue Star.

But in the past ten years, a large number of players have retreated and abandoned the pit, and the game has been shut down.

Qin Mu is the only one left to sign in every day to get experience, do quests and dungeons, and plunder resources…

For ten years, Qin Mu has occupied the first place in all the rankings, and his level has also reached the first place in the entire server.

“What a great game, it’s a pity it’s closed.”

When Qin Mu was depressed, he found that the game world suddenly became reality!

There are swordsmen flying with their swords, and their sword qi has broken thousands of miles; there are magic cultivators who violate the law and disobey discipline, and separate one side; there are immortals who set up sects and create their own fire; Qin Mu sees himself, the immortal emperor is complete…

But he found that the most troublesome thing was that all the Dao Companions he got married in the game were all realized.

Not only that, the dungeon quests he cleared in the game, the bosses he fought, and the female NPCs he stalked all came to life. The most terrible thing is that the system also exposed his identity as an Immortal Emperor!

- Description from novelbuddy

An alien race invaded the Earth on June 6, 2128. At the midst of this war, many nations allied with the alien threat and the war nearly wiped out the rebelling humans of the planet. At the edge of mankind's survival, the United Nations Army launched its forces to eliminate the immediate stellar threats that loomed over Earth.

General Seeker Carlean, commander and leader of the mission, risked and gave his life to destroy the immediate stellar threat. The battle was won though Earth lay in ruins. Perhaps mankind will live to see a few years of peace before the alien threat returns to wipe out their existence.

At the immediate aftermath of the stellar battle, the fallen Seeker Carlean awakens and finds himself at aged 17, living the peaceful life he lived 16 years before he died.

So begins a new game in the battle for humanity's survival.

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

After dying in the world of One Piece, he was reincarnated once again this time as Neji Hyuga. But fate was no kinder here. With his father dead and the cursed Caged Bird Seal looming over him, for his survival he made a ruthless decision....