I Might Have Fallen in Love With My Childhood Sweetheart - Chapter 18 - 16 God Ji Climbs the Wall

The world is governed by the Seven Legendary Heroes, their authority absolute and unchallenged even by their own descendants. They manipulate the world and its people according to their whims.Jonan, son of one of these legendary heroes, discovers his affinity with crystals and mastery over flames, yet lacks skill with weapons, which brings shame upon his family. As he delves deeper into the dark secrets connecting the heroes' power to the rifts and an ancient evil lurking, waiting for the right time, Jonan must move forward with unwavering determination.

agreed. He thought they might just talk, have a few drinks, and that nothing significant would happen. However, she invited him to a hotel, and they spent the night together.The next morning, she told him it was just a one-night stand and that they would probably never meet again. She said goodbye and left. Ronan also decided to treat it like that.The next day, at his college's hosting club, Ronan was given the responsibility of hosting that year's annual function, where they had invited a singer.When Ronan looked up at the singer, he was shocked—it was the same woman he had spent the night with. After checking her history and social media, he formed an impression of her. Every picture she posted was in revealing clothes, bikinis, or almost nude outfits.He concluded that she was just a promiscuous woman, likely driven by lust, and that she had probably chosen to spend the night with him simply because she found him handsome.Understanding this, Ronan decided to focus on his work. That morning, she had made it clear that it was just a one-night stand and nothing more. He would treat it exactly that way and carry out his responsibilities.Protagonist has System---No NTRIt's Harem, with many girls but The Singer is Main Heroine.

That night, she shed off the image of a young maiden’s immaturity, forming a ripple in the deepest parts of the Cold Palace…

That day, she kneeled before him begging for mercy. She didn’t want anything. She only wanted to leave the palace and become an ordinary girl….

A bunch of elegant and good looking heavenly princes. A lowly palace maid with a mind as calm as still water.

If they were to meet, would it be an encounter like dewdrops and the autumn wind or would it be a lament of a country…

- Description from Novelupdates

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates