Arcana: Heat and Cold

Residential areas, farmland, and mountains in the distance. Although it is hardly a remote area
It can never be called a city. It is a country town that can be found anywhere.
The protagonist returns there at the height of summer and takes a job as a live-in temporary worker at his former alma mater.
He takes a job as a live-in janitor during the summer vacation.
There, he meets his niece, Takanashi Takanashi, who has moved there after her parents’ divorce.
Otsuwa (Takanashi Otsuwa), who moved there after her parents divorced,
Rino Akatsuki, her older childhood friend.
Rino Akatsuki, her older childhood friend. Otoha is a transfer student taking remedial classes,
Rino had to attend school during the summer break for club activities.
They used to play together as babysitters in the past.
The relationship between the three reunited girls was not the same as it had been back then, but had changed slightly.
Was it simply because they had grown up, or…?
A chance encounter with Otowa and Rino,
The protagonist begins to develop a special relationship with Otowa and Rino.

When he woke up, he found himself in a dark and suspicious room.
And right in front of him is his classmate, Katagiri-san, who he secretly likes.
"Hmm...!? C-C-Could this be a sign?!"
"Hey, fatty uggo!! Hurry up and work for me!!"
He was mistaken.

In the Omegaverse, everyone is born into one of three secondary genders: Alpha (α), Beta (β), or Omega (Ω).

The majority of the population are Betas, while Alphas sit at the apex of society with their superior looks and abilities.

Meanwhile, Omegas have a special characteristic: they periodically go into heat, at which time they become irresistible to Alphas.

Rino is an Omega, and a new recruit working for a digital travel magazine.

Chizu is an Alpha, and Rino's boss.

"Um, Boss! It's my first day, and..."

The moment Rino hears her boss's voice, she suddenly goes into an off-cycle heat!

Chizu respects the fact that Rino doesn't want to quit her job just because of her natural urges as an Omega and makes a decision to help her.

"Just bear with it. I'll get it over with soon."

Entranced by her cool fingers and sweet scent, Rino gives her body over to Chizu.

Fate begins to toy with the two as their feelings dance the fine line between reason and instinct...