My Senior Brother Is a Villain: A Daoist Warrior, One Sword Between Heaven and Earth

The rating just came out, so it'll go up. Apologies for any OOC moments. A little angst.

[System + fox spirit + Daoist warrior + Scumbag System + two male leads]

The Wangquan clan, one of the three great families in the cultivation world. (Original setting.)

Wangquan Wujin grew up without a mother. His father, Wangquan Jingheng, raised him to become the strongest Daoist warrior, the ultimate weapon of the One Qi Alliance. Imprisoned from birth, he spent eight hours a day practicing swordsmanship and was forbidden from going outside or making friends. By the age of ten, no one in the Wangquan family could match his swordsmanship except his father and godfather.

He also grew up with a loving senior sister, Wangquan Mingli. Later, under the assumed name Situ Wujin, he joined the Xuanming Sect as a disciple of its leader and became the second senior brother, a lazy student who skipped class and chose to lie flat all day. Even the sect leader could do nothing about him.