MTL - My Girlfriend And I Transmigrated - Chapter 151 King of Zhenbei

Su Ran, a music prodigy, woke up transmigrated into a book.

At that point in time, the main story arc in the book had already been completed. As a villainess female supporting character, not only did she need to take over the original owner’s pitiful life in poverty, she also gained an instant son right at his rebellious period.

Ten or so more years from then, the son would turn into a twisted, evil villain. He would appear in one of the extra chapters to pick on the male and female lead’s children.

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Su Ran: Son, you shouldn’t be too outstanding.
Su Han: Why not?
Su Ran: ’cause you will be killed.

Su Ran: Son, would you like to learn music from me and become a zen, little fairy boy who only needs to drink dew.
Su Han: No, I want to go into business so I can support you.

- Description from Novelupdates

With a marriage contract forcefully done, he married her, and all she could do was comply, and resent him deeply for that and for all the following misunderstandings they faced.
However, it was already too late when she understood she actually loved him.

This book, alternatively titled “The Heavenly Court of Great Qin,” unfolds the tale of Qin Jun, who finds himself transported to a realm where he assumes the role of a demoted prince. Despite the challenging circumstances, destiny has more in store for Qin Jun than despair—enter the Mythology System!Under this system's influence, any character from mythology can be summoned into existence - The awe-inspiring might of the Supreme Heaven Great Sage, Sun Wukong, capable of shaking mountains and rivers with a single strike of his staff; The Thousand-Mile Eye and Favorable Wind Ears, acquiring profound perception of everything in the world.The Tathāgata Buddha, holding the Buddha Land within the palm of his hand, becomes an indomitable force from which no one can escape. Amidst this divine realm of Gods and Demons, Qin Jun solemnly pledges to rise as the preeminent Divine Emperor, determined to carve his path to unparalleled strength.

Following a brutal and tortured death, a former assassin, known only by his codename Kuro, is given the opportunity to reincarnate in another world, a world with magic and monsters. Armed with an unrivaled healing factor and an inhumane pain threshold, Kuro opts to go for a reckless direct approach in this world instead of a stealthy and cautious one, and as a result, slowly gains attention bit by bit.

Having previously been a loner in his old life, he interacts and befriends people for the first time in his existence, however, his blunt nature also sees him making just as many enemies, both big and small. By combining his old assassin skills with the magic powers of this world, along with his high resistance to pain and rapid regeneration, he doesn't take long to establish himself as a formidable force in this world.

Initially, Kuro only faces minor threats, like weaker monsters and bandits. But before too long, the threats slowly but surely become more and more severe…from Zombies to a bloodthirsty empire to Vampires and Demons, and even divine beings…however, as the enemies he faces grow stronger, so does Kuro, gaining rare powers that have never or rarely ever been seen in this world…