Naruto: The Life Changer - Chapter 86 -:

In short, MC inadvertently created a world, but as the creator of the world, he did not know the world at all. He should have lived here like a fish in the sea with some plug-ins that MCs always have. But now he is even stumped by the bugs in the instant world. Luckily, in this world he has found his shadow guard, or his lover? So the daily adventure is getting not so boring…

- Description from Novelupdates

Mu Sheng had researched quantum mechanics and engineered cross-sea bridges in her past life. However, she became a small-time celebrity plagued with a bad image overnight. This sad foolish woman was made to marry a sick man to counteract his bad luck. Even when her kidney and marrow were taken from her, she was glad to help. Memories of how her body’s original owner sacrificed everything for a scum flooded Mu Sheng’s mind, making her eyes roll.

The news exploded in the entertainment industry. Mu Sheng performed a 1440 degree somersault when she skied on an entertainment program and left everyone awestruck. The anti-fans felt she must have edited the image or hired a stunt double. Two weeks later, the International Ski Federation invited her to join them as a lifetime member. In time, government research, hacking, calligraphy and brush painting, and music associations all reached out for her to join their ranks one after another.

So what? She ended up marrying a useless man who was on the brink of death and would become a widow in a matter of time. Things did not quite play out as everyone expected. The useless Mr. Li did not die and ended up healthier than ever. He even shockingly turned out to be a mysterious big shot in the corporate world. Mu Sheng did not wind up a widow and Mr Li. loved her to bits.

Mu Sheng glanced at a man. “Now that you have been healed, can you sign the divorce agreement?”

Li Hanchen smiled. “There’s one more thing you haven’t healed.”

Mu Sheng frowned. “Are you still unwell?”

Li Hanchen said, “I love you to death and there’s no cure for it.”

He had found a ray of hope amid the darkness and her name was Mu Sheng.

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?

Our straight (?) bottom woke up ten years into the future and found himself on the bed of his childhood friend… At the start, the bottom was shocked to his very bones, but he soon quickly accepted this premise and found the whole situation to be rather amusing. Precisely then, the bottom once again went back to his timeline — back to when he and the top were just platonic childhood friends.

Landmines include but are not limited to: Sweet & naive bottom, a president story, logic is dead, slow-progressing romance, the protagonist’s name has too many character strokes, the names are hard to pronounce, too many gay characters…

- Description from novelupdates