The supporting character's harem is very normal - Chapter 12: Camouflage skill

Because of his master’s wine, he had somehow become the husband of a cold CEO — I’m still a virgin, please be gentle. He was from an ancient sect and had both Buddhism and Dao cultivation methods. The youth Qin Wu stepped out of the great mountain once again, stirring up the winds and clouds in the city.

- Description from Novelupdates

I got transmigrated into a game I’ve never seen before.

I thought it was a top-notch RPG and spent 30 years on it.

I retired as a war hero and planned to spend my remaining time leisurely.

But it turns out, it was an academy story?

Legend says, that there is a great demon, who is the human kind’s public enemy. He is the galaxy federations’ nightmare as he wanted to conquer the whole universe. On the first day, he completely took out the human fleet, plunging them into disorder. On the second day, he declared that he will wipe out the whole federation. On the third day, he declared——that the hero who shot him in their previous battle must marry him, or else, he will destroy everything.

The galaxy federation president and the council members had a long meeting after that. They decided to dispatch a soldier, Wu Xing Yun, and marries him off to the arrogant demon. Wu Xing Yun was once a hero who fought for the nebula, and henceforth, he was tasked—— for the sake human race and the universe’s peace, to eliminate mistresses, settle his matters with the mother-in-law, and fix the man’s crooked ways.

Wu Xing Yun was very perplexed when he asked his commanding officer: “Sir, why did it have to be this way?”

Commanding Officer: “Soldier, bear in mind, that this mission of yours, is for the sake of the universe and mankind’s happiness. You must hold on to your husband, and fight other mistresses! Do you have the confidence to accomplish this task?”

Wu Xing Yun, stood straight, saluted, and instinctively replied: “Sir, yes sir! I will accomplish this task!”

- Description from Novelupdates

Mu Xuan transmigrated to a dangerous world of beast tamers. Fortunately, after he successfully formed a contract with a beast, he awakened two major cheats consecutively: bloodline extraction and merging as well as an information panel.

Hence, Mu Xuan extracted bloodlines and designed the strongest beast evolution lines until he became the strongest beast tamer.

The world was beneath his feet and the sky was not that far out of reach!

Icy Crystal Spirit evolved into Icy Crystal Frost Polar Dragon, and then Cinder Frost Dragon and finally Ember Star Dragon.

Space Tanuki evolved into Void Dragon Tanuki, and then Dimension Leaping Dragon Tanuki and finally Heaven Divine Dragon Tanuki.

Heavenly Fate Illusion Butterfly… Nine Lives Reincarnation Butterfly.

Destruction Demon Bear…

Divine Elf Envoy…

Golden Sun Crow…

Old Man Time…