Summoning Cauldron

I became the mayor after my father passed away. As the unlikable "Magic Trash," I used high-level props and awakened the magic circle! Unexpectedly, a frightened woman in her tattered clothes -- Liz had appeared... No way, no! Did my guardian beast just get blocked by a woman like that?

As a demon under my control, Liz always looked arrogant as she kept competing against me. There must be one who wins and one who loses, even if it is by doing naughty things. But sometimes... she would also smile gently and speak of her loneliness, just like... the harshness was her defense so that no one could enter her heart.

As the thorns enveloping her sprouted new shoots, the city became more and more prosperous, but strange things also emerged bit by bit. The [Withering Flower] curse was gnawing her soul and somehow also affected me!

A young man despised by his family discovers that he was left behind while they and his little sister go on vacation to some mysterious place.
Since “you” never had a computer, you take this opportunity, if it can be called that, to use your little sister’s computer.
During this time, some mysterious being contacts you in the chat and makes you an offer.
What could this offer be?
 

Summoned as a hero, yet given the job of “healer,” you were banished from the kingdom as a liability!
You collapsed in the wilderness, only to find yourself at the entrance to a dangerous new dungeon in the frontier.
There, you were rescued by Lizeria Valgrain, the commander of the magic corps, clad in white and gold.
She recognized your healing magic as a special power that “stabilizes magic itself.”
The new dungeon was impassable due to a powerful magic storm.
Lizeria decides to take you with her, and the two of you challenge the dungeon together.
Supporting each other as they overcome dangerous traps and monsters,
Eventually, with your help, Lizeria becomes able to unleash magic beyond her original capabilities, and they embark on a journey to destroy dungeons across the land!

A young man despised by his family discovers that he was left behind while they and his little sister go on vacation to some mysterious place.
Since “you” never had a computer, you take this opportunity, if it can be called that, to use your little sister’s computer.
During this time, some mysterious being contacts you in the chat and makes you an offer.
What could this offer be?

This is a land once kissed by ancient corruption.
Now, it’s divided into nine districts ruled by power, wealth,
and an endless obsession with luxury aesthetics.
The smaller the number, the higher the status.
District 1 residents summon private spacecraft just to buy toasted sandwiches.
District 9 residents skip cans across dirty puddles to trade for clean water.
You come from District 3 — polished on the surface, hollow inside.
A paradise for tech obsessives and influencer babies.
You're a privileged kid from the wealthy zone.
Money? Endless.
Robots? Everywhere.
Human warmth or social skills? Error 404.
Your hobby is perfectly healthy — collecting bizarre artifacts that probably
should’ve been burned by the government decades ago.
Singing toilet paper.
A mug that curses at you.
A notebook that writes poetry at 3 a.m.
They all dance in your room like it’s normal.
Then one day, you accidentally buy a parody-looking “Forbidden Summoning Book.”
Probably just another marketing stunt, right?
Except… it works.
From its pages emerges a cosmic calamity in the form of a girl — Ain,
an outer god who can erase entire districts with ease.
Her plan was simple: grant wishes → take your soul → clock out.
But then you said:
“I don’t really have any wishes.
Wanna play board games with me? I don’t have friends.”
“…Are you serious?”
“This is a rare edition. I even have a dice sterilizer.”
And just like that, an entity from beyond reality
gets pulled into domestic life by a lonely nerd with premium tabletop accessories.
Thus begins your supernatural roommate life —
a desireless shut-in and an ancient outer god, under one roof.