MTL - Mr. Lu Wants To Promise By Marriage - Chapter 124 don't explain anything...

After dying in the modern world, I was reincarnated in a gender-reversed world.“Ah, a demon! It’s a demon!!”“Immediately! Execute-him!”…with a very troublesome trait called Demon’s Blood.Since everyone in the world wanted to kill me, I fled to the forest.[Why is there a man here???][This is terrible… wowowow][Hnng… Oppa~aah…]But… strange people keep coming to my forest.

Ever since the appearance of the Tower of Genesis twenty years ago, children's dreams began to change. Becoming a Hunter became the most popular aspiration.The same was true for Nathan Cole. But unfortunately, the Tower had yet to summon him. The Awakening he longed for never came.Until one day, he was suddenly summoned into the Tower. He was overjoyed—but the happiness didn’t last long.Nathan had been summoned… because of a bug.

Gu Yanfei was reborn. In her last life, it was only after her death that she realized she was the real daughter in a story about a real and a fake rich daughter. She was supposed to be the daughter of a nobleman, but someone switched her with another child at birth and left her leading a wretched life — a cannon fodder from start to finish. The female lead was the fake rich daughter, but she was also blessed with good fortune and the affection of the Gu family, taking everything that was rightfully Gu Yanfei’s.

In that life, Gu Yanfei lived as she died, with no rhyme or reason. However, after her death, she transmigrated to a cultivators’ realm and became a healer… But after cultivating herself for 200 years, she failed her ascension trials. Then, one of the divine thunderbolts struck her and sent her back to her last life — back to the moment when the identity of the rich daughter was exposed. Upon her return, everyone in the nobleman’s residence was laughing at her for being illiterate and uneducated, a far cry from the fake rich daughter blessed with good looks and a kind heart, who stood above the rest. They just did not know that Gu Yanfei was a fully-leveled character, reincarnated back to this moment!

One day, I woke up only find out that I’d become a Demon Lord, an individual responsible for protecting a dungeon. The world I’d been spirited away to was one filled with violence. Gigantic monsters wandered through it and competed with each other each and every day for the right to survive. I had no choice but to strengthen my dungeon’s defenses in hopes of living another day—or at least that was what I’d thought. For some odd reason, I instead ended up spending my days in relaxation and bliss.