Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 15 - 15-12. Hero in the Labyrinth

Shao Qing’s only regret in life is that she blindly fell in love with a worthless man. She gave up everything for him, but in exchange was run over by his conniving mistress when she was close to her delivery date. Fortunately, Heaven left her a way. Crimson rain fell from the sky, the end of the world arrived, she resurrected in the morgue and gave birth to a little monster. Turning into a half human, half zombie freak; her son neither human, nor monster; they have no other choice but to rely on zombies’ crystal nuclei to develop their special abilities and continue living. This debt, she’ll definitely repay that cheating couple!

- Description from Novelupdates

Eldraus was once a normal world , peaceful, beautiful and full of life, much like Earth.But everything changed when the Beast Mutation began.Animals started turning into terrifying monsters larger, stronger, and unnaturally violent. Kingdoms fell. Cities burned. Humanity was pushed to the edge of extinction.Then came the System, a mysterious power that awakened within humans, granting them abilities to fight back. Over time, the system became a part of everyday life. Every person now awakens with a System, ranked from the weakest gray to the legendary black and above.This is a world where strength rules, and the weak are left behind.Kaelen Maglor, son of a noble, awakens with a rare black support system. People mock him, expecting him to be a healer. But Kaelen has no intention of following their path. He chooses to walk his own.With danger rising and powerful enemies lurking, Kaelen enters a deadly academy that trains the next generation of fighters. There, he will uncover secrets, face deadly trials, and learn that the system that grants power... might also be hiding a terrifying truth.In a world where monsters roam and only the strong survive, Kaelen must prove that even support can become unstoppable.

What will happen when a wild, arrogant, and cold secret agent crosses over to the body of a weak and timid young miss of an aristocratic family?

She, Chu Ye, is the CIA agent who grabbed the outstanding title of “Agent 007” after the death of Qian Xie. However, she fell in love with the enemy during a murder mission and died for love.

She, Boling Yili, is the seventh young miss of the Boling family, the greatest aristocratic family of the Eastern Nation, but because of her natural timidity and cowardice and her inability to become a sorcerer, she was regarded by the family as a disgrace and was exiled to a small remote town, where she supposedly died due to suicide and drowned in a pond.

When matters are left unsettled, the heart and body will almost thirst for blood, longing for the wildness and madness and even undergoing change to the point of blurring the fine line between life and death. From the moment Boling Yili’s body was reborn, the Wu Man Continent better wait for they will witness what it means for the sky and the earth to turn upside down!

- Description from Novelupdates

When he did not know her true identity, he treated her very badly, he disliked her too much, she was not elegant enough, she was in the way...Only later did he realize that the woman was his legal wife! He repented, tried to recover her feelings, but she was determined to divorce him.