The supporting character's harem is very normal - Chapter 52 Their relationship is too complicated.

Growing up parentless, Shi Yan, who was left with a large amount of inheritance money, bore a general disinterest in life.

The only times he felt alive was when adrenaline coursed thorough his veins. He quickly found that extreme sports, bungyjumping, cave diving & skydiving, gave him the biggest kicks. The bigger the adrenaline kick, the closer he was to death, the more alive he felt.

Waking up in a pile of dead bodies in an unknown land, after a diving adventure had ended disastrously, he quickly realizes the body he now possessed was not his own.

Follow Shi Yan as he explores this new world where danger lurks around every corner, and death is only a breath away; a world in which Shi Yan could not feel any more alive.

Song Yu, an up and coming architect was supposed to be the fiancée to the second son of the Qi Family… until her family went bankrupt. The engagement was called off and she finally has the freedom to love whoever she wants to! Years later, a twist of fate made her cross paths with the Qi family again. In order to land a prestigious architect role in an upcoming hotel construction project, she had to impress the director of Qilin. Follow Song Yu as she navigates through life and love!

- Description from Novelupdates

She married a driver she just met. However, the last thing that had ever come to her expectation was that her bridegroom was no other than the most mysterious billionaire in the city. This marriage brought her baby twins. Thus, she worked harder to support this family. She was the queen of the entertainment circle. When she met the king who dominated the business world, she finally knew her husband’s true identity.

Sword God, Ahn Suho.The greatest swordsman player in humanity was, surprisingly enough, a civil servant hunter belonging to the Korean Hunter Association.Suho chose the path of a public servant purely to end the gates.Perhaps that’s why?When one of the disaster-level gates, called the final gate, was attacked,In an ironic turn of events, he was betrayed by his comrades.“You should have joined us from the beginning. Now I know why people say that civil servants are so inflexible.”The reason his comrades betrayed him?Because if the gates were closed, their power would disappear.Is this the end?Just as Suho’s consciousness was fading away,[Rebooting Player Ahn Suho’s system.]The system gave Suho one more chance.A chance to go back to the past and set everything right.