Citadel for All: The Only Unit Angel at the Start of the Game - Chapter 1: Angel!

Chatting in the dormitory at night, roommates wonder how much pain Aunt Flow brings. Mr. Perfect He Zhi Zhou has never bothered joining in on these petty talks for amusement. That is, until he became a woman and laid in bed with a white-cast complexion……

Chatting in the female dormitory at night, roommates sighed over the current pairings in the school of engineering, Shen Xi was a little curious that the problem with these topics is that there was no way to test them. Until she became an engineering male and a bar of soap dropped in front of her……

Introduction in one sentence: About how a top-scoring perfect male with no desire in the opposite gender and an amusing female lead were set up like lightning setting the ground on fire spreading out of control—leading to a sweet and rippling life……

Life is so long, don’t be so arrogant. Some things are bound to deviate.

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

This is the story of a crazy lich who possesses an internal game system and brings catastrophe to the entire world.

“Let’s look at the daily quests today... it’s the damned choose one-of-two-options-type again. Destroy a town with a population of 30,000 people or above; reward: 10,000 evil points. Steal lollipops from 3 children; reward: 1 evil point. If neither of the quests is completed, then 2 points will be deducted.”

“Tsk! You think I’m stupid? If I really destroyed a town, a crusade of Epic-ranked Holy Knights would definitely come hunting me down. Even if I earned the points, there wouldn’t be any life left in me to spend them. I better just go be a kindly lollipop bandit.”

I’ve already had enough of being a notorious lich. Who says that a lich can’t be a good person? I’m definitely going to beat this damned system and be an upright and dignified good man.

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.