Template!! An Angel's Gift

The protagonist accidentally stumbled into a mysterious billiards club and encountered a variety of billiard angels inside.
Strive to defeat them with your billiard skills! Victory will earn you rewards from the billiard angels!
Can't wait any longer? Go challenge these billiard angels right now!

Your first adventure begins in four days. And today, you’ve reached “The Angel Inn”, where you can relax before the departure. Is this your lucky day? The only male guest, with 3 beautiful girls.
Get to know them, and be wise in managing your time, because good things may happen at The Angel Inn!

TenInai is about a senior high school boy with relationship problems; he's got few friends and perhaps because of his bothersome kid sister, is averse to any steady relationship. That is, until he has a sexual encounter with Kurihara Touko. Touko, a classmate of his, is a sensitive, simple girl desperate to make an impression on others, and willingly offers herself to the protagonist. He runs away from a relationship; Touko clings to him hoping to find one. This unusual relationship soon leads them on a long soul-searching journey.

"Hospitality"... That is one of the most important study subject for angels, who will be guiding humans and providing them assistance in the future.
How-e-ver! This lazy, sluggish angel apprentice Mika over here has been skipping those lessons, so much she's in the verge of getting retained from promotion!
At this rate, she's going to be an angel apprentice for life...!?
To break the status quo, Goddess Freya gave orders to Mika and her angel apprentice friends, Bel and Az, to descend down to human land. Collect "Love" to avoid retention.
In a desert town full of mysteries, our Angel Apprentice Mika shall demonstrate her outstanding performance!
...or, maybe not...!

It began as a day just like any other.
A dull morning, an uneventful trip to school, an afternoon of tedious lectures...
And then I met her.

"I'm an angel, sent here from Heaven on a very important mission."

She appeared suddenly, and without warning―a beautiful girl who called herself an angel.
Spreading her large, snow-white wings, she made a declaration that would forever change my life.

"I come in search of the Demon Lord's reincarnation."
"That being you, Tanikaze Riku."

That's right, apparently I was a Demon Lord in my previous life. From some other world to boot.

Unfortunately for me, the anarchy wouldn't stop there.
Memories from a previous life, visitors from another world... It was just one crazy, chaotic event after the other.

"Wait, what? But that doesn't― Huh?!"

Thus began the story of Tanikaze Riku, a tale marked by the loss of his normal life, along with so many other precious things.
Aside from even more anarchy, what else does the future have in store for him?