The Werewolf's Vampire Mate - Chapter 88: Maybe this could work.

“I can’t accept this! I can’t! Even as a ghost, I’m going to spend eternity cursing that your relationship will shatter like glass! Break apart like a pair of mandarin ducks that fly away from each other!” With such a persisting obsession, it would be difficult for the vengeful departed spirit to move on.

Huang Dan’s pain nerve is innately different from the ordinary people. A little tore in his skin can cause him to sweat all over his body painfully to the point of him unable to make a word out.

Somehow, he began to cross world, following Mr. System to do the tasks…

In the first world, Huang Dan realizes what it means to die painfully and to live to die again.

TL’s summary:
MC suddenly transmigrated and is bind to a system, requiring him to solve mysteries. Born with a higher degree of pain sensitivity, he met different people in the different worlds and learns what kind of emotion smiling is.

- Description from Novelupdates

This novel is also known as The Indomitable Master of Elixirs

She is the twenty-fourth century’s strongest immortal cultivator, but transferred into a world of magic where demons roamed rampant; a punching bag tyrannized and ostracized by her clan on one side while the scum of a man that is her fiancé humiliated, trampled her on the other side…

Want to ravage her? She laughs as she will soon teach them how to behave themselves!

Magic is amazing? Her Five Lightning’s Bombardment Talisman will turn you into ashes! Medication is very incredible? With one furnace of medicinal pills, useless can also become genius! A vigorous army of a million is very ferocious? With Scattering Beansprout Soldiers, all of you can slowly play!

Smilingly watching as those who court death act vilely without salvation. Those who submit to me prosper, those who oppose me, perish!

Only… For what reason does this Grandmaster whose face is as beautiful as a flower, when facing her, always “secretly casts passionate glances”?

A certain Grandmaster: “After sleeping for so long, now you don’t acknowledge”?

- Description from novelupdates

Following a regrettable teleportation gate incident, freshly graduated spatial mage Tila found himself in a strange bipolar world. On one side are the sexless humans, completely isolated from the rest of the world inside their domes. On the other side lies the bustling outside world, composed of a myriad of non-human species.Should he focus on the humans and teach them a thing or two about their bodies? Or should he mingle with the spirited outside species?Of course, he shall do both, by becoming the sole true interspecies trader!