So, They Were the Protagonists All Along

Mu Zhian traveled to the world of immortals and became a supporting role destined to be used as a stepping stone by the protagonist.
He wanted to make friends with the protagonists who were the chosen ones, but when Mu Zhian looked back, he found that the girls around him were either the protagonist's childhood sweethearts or the protagonist's fiancée.
The most incredible thing is that those girls who should have liked the protagonist all liked Mu Zhian, the supporting role. Looking at the beautiful girls around him, Mu Zhian had a bold idea and decided to kill the protagonist and turn over to be the master.
After finally leveling several protagonists and getting a lot of resources, he shared many resources with the girls around him in order to improve the strength of the girls.
I thought that I would be able to prove my Dao and become an emperor in the future with many resources, and ascend to the immortal world.
Until one day, looking at the rolling clouds in the sky and the several empresses who were reborn in the thunderstorm, Mu Zhian's eyes gradually lost their spirit and murmured: "I am so stupid, really... I thought that after killing those chosen ones, I would be the protagonist of the new world and a future immortal-level strongman, but I didn't expect... they were the protagonists." (This site solemnly reminds: This story is purely fictional. Any similarities are purely coincidental. Do not imitate.)