MTL - Mai Kitsune Waifu - ~ I should tell you the 703th.

Yang Feng somehow transmigrated into a different world and received a legacy of an ‘ancient high tech’ family, which does not directly raise his power, but gives him the technology to build things which are way more advanced than the seemingly medieval world.

Jian Rushi, born in a rich family, was a college girl. Due to some economic reasons, her family went broke. Her father committed suicide under great pressure, while her mother ran away with someone else, leaving her alone in this world. As she tried to find some comfort from her boyfriend, she found that her boyfriend cheated on her. Feeling devastated, Jian Rushi thought of ending her life. But she wanted to do a crazy thing before that. Suddenly she remembered she was still virgin. So she decided to sleep with a man before she died. She went to a pub one day and saw a pretty man drinking there alone. She mistook him as a money boy and took him home. After they slept, she had no money to pay him. As the compensation, Jian Rushi became the mistress of that man, who turned out to be a golden bachelor. And a series of embarrassing things happened…

- Description from Novelupdates

This is a work of fiction. Names, characters, places and incidents either are products of the author’s imagination or are used fictitiously. Any resemblance to actual events or locales or persons, living or dead, is entirely coincidental.Please note that this work of fiction is not safe for work (NSFW). It contains words, scenes, and phrases not suitable for audiences below 18. Be aware.—All the characters here are 18 and above—SynopsisOkumura Kouhei is in love with Saonji Hina, but she’s as cold as ice and doesn’t let anyone get close—she's like a flower that’s impossible to reach. However, everything changes when Kouhei uncovers a secret about Hina that turns his world upside down.To make matters even more complicated, members of the student council decide to get involved, adding to the chaos swirling around him. And let’s not forget about his neighbor next door, who seems to have her own agenda.What will happen to Kouhei now that he’s stumbled upon something he wasn’t meant to discover as a mere human?

Roy’s life was nothing special. The only thing commendable was the last few moments when he saved a mother and her child from a drunk driver.
…
It’s really an egg! Damn it, what kind of monster have I become? Did I fall into Hell instead of making it to Heaven??
Join Roy as he ventures through various worlds with the Custom Made Demon King System—a system that allows Roy to draw anything he can imagine and create it through exchanging souls!