Shadow Monarch in DC - Chapter 15: Shadows in Limbo

Su Jing, after the graduation, run up against the wall, discouraged, he returned to his home to adjust the mood. Then he discover that his own backyard had become the Galactic Garbage Station. Every day lots of trash appears, some are from Tomb of God, Battle Through the Heavens, Coiling Dragon, One Piece, Naruto, Bleach, X-Men, Captain America, Iron Man, and other novels, animes, and Marvel universes. As the garbage station owner, Su Jing has to process these trash duty. From the beginning, he thought it’s a hard and unprofitable task, afterwards, he discovered that’s his whole life found the most beautiful cushy job.

- Description from Novelupdates

Once upon a time, a hero had been summoned to a different world in order to defeat the demon king. After the war stretching 3 years ended the commendable hero slew the demon king. And he was forcibly deported back to earth after being dismissed.

Such bullshit!

Elves in addition to beast race, dwarfs and demon race. Even though I wanted to make a harem in the different world I saved! My dream will not come true on earth, where there is no magic at all. Thus, the hero returns on his own. Without the blunder of being extradited to earth this time, he will build a harem of his own in a different world.

One day, I was summoned to this world.

Xia Muqing is originally an archaeologist when she unexpectedly transmigrates. In another life, she becomes the useless daughter of a reputable family who is mocked and bullied by everyone. A brand new Xia Muqing is reborn from the ashes. From then on, she uses her skills and medical knowledge to subdue beasts and to seek revenge!

She uses poison to repay her sister who was born of her father’s mistress. She swears to make those who harmed and betrayed her pay with their blood!