MTL - Fairy Tail: Start To Capture the Fairy Queen Erza - Chapter 17 S-level tasks

Six years ago, she signed the ten-month agreement with all her sorrows, and as agreed, she received the down payment. But when the agreed time came, the buyer did not show up to claim the 'treasure'. What was going on?Six years later, her precious son surprisingly told her, “Mommy, people might wear the same clothes or drive the same car, but I met someone today who actually has the same face as me! Can you believe it?”“Don't talk nonsense, how could someone look exactly like you?”Her son, dissatisfied, pulled his friend out. “Don't you believe me? Just take a look!”Lin Xiangwan took a glance, then, thud, she fainted, collapsing onto the ground.Who on earth... is this...?

One night she gets drunk and mistakes the most well-known Mafia boss for a host and intends to sleep with him.

Oh my! What should I do? It’s best to run away!

- Description from Novelupdates

The mighty heavens exist, ruling over all things. Those favored by its will are granted power and fortune, while those who dared to oppose it perished, leaving none behind. This is the tale of a man who once defied the heavens, underwent multiple reincarnations, and returned once more to the cultivation world. But here’s the twist. This young man remembers nothing of his past lives and is simply a teenager from Earth. How will he who has no knowledge of cultivation and experience in fighting, survive this grim world while being an inner disciple of a lower realm force—or so Xiao chen, the teenager thought till he heard a systematic sound in his mind. [Ding! Host has awakened the heaven’s destined villain system!]

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.