Toaru Majutsu no Index: New Testament - Volume 17, Prologue: Or the Assumptions Include the Conclusion - to_the_Girl’s_ABYSS.

After falling to my death, I woke up with two bodies?!Reincarnated as both a humble commoner boy and a privileged young noble girl, our protagonist enjoys their new chance in life with two different perspectives. Although they only wished for a peaceful life, the world had other plans in store, presenting them with a few unexpected obstacles along the way.Now, they find themselves confronted with bandits, secret evil organizations, terrifying monsters, and... romance?

Tian Mi, a single mother with two children, has finally gotten her life under control… that is, until a handsome VIP at the hotel where she works claims to know her and is somehow in possession of her wedding ring from her former marriage. If that wasn’t enough, her ex-husband, now a successful entrepreneur, has also shown up, and is looking to rekindle their relationship. Who is this stranger? Why has her husband returned? Will she choose new love over an old flame?

Suo Fei, a veteran NEET has spent three days and three nights strategizing his way through the highly explicit H danmei game masterpiece “Yalance”. Furthermore, he was able to capture all nine little shous from the nine great races. However, as the final, 10P feast was approaching, he unexpectedly transmigrated. He transmigrated into the real country of Yalance…

In the foreign world, the martial artists dominate the world and the sword of the emperor controls the fate of hundreds of millions of lives! Long Yu, the number one killer on Earth, after dying, takes rebirth in this new world in an aristocratic family of martial artists but faces rejection because he is unable to practice martial arts.

- Description from Novelupdates