When Chuuya met him, she was only 19 years old. She had been hired by a pair of billionaires who were desperately searching for a live-in nanny to take care of their son for an indefinite amount of time, while they went off to enjoy their fortune, who knows where, and for who knows how long.

Nakahara, desperate to find a job, accepted the offer, signing a binding contract that forbade her from quitting until her duties were 100% fulfilled; in other words, until the boy's parents decided to come back and take responsibility for their child.

And to make things more interesting, she would have to live with the boy. Of course, all expenses would be paid by his parents. Not that the redhead minded much, the pay was outrageously good.

That very same evening, someone knocked at her door. Behind it stood a very tall boy, with deep chocolate-colored eyes and a clearly displeased expression on his face. He introduced himself as Osamu Dazai, 16 years old.

Naturally, the two clashed from the start. Dazai was a spoiled, attention-starved boy abandoned by his parents, while Chuuya was a young woman with very little patience for brats.

But time has a way of forcing people to learn.

Dazai moved into Chuuya's house (which, technically, was his too), and both had to figure out how to coexist under the same roof.

The redhead found herself dealing with a complete nightmare in the form of a ridiculously handsome young man.

But little by little, something shifted.

They began to realize they liked a lot of the same things, shared the same dark humor, the same stubbornness, the same taste for mischief, and soon enough, it didn't take long before they became best friends.

By the end of the first year, Nakahara had learned to feed Osamu like a baby, and they started doing things like bathing together, sleeping in the same bed, following each other around the house, refusing to go anywhere without the other, and essentially becoming inseparable.

In the second year, their trust in each other grew to the point where there were no secrets between them, no physical boundaries, and no shame. They felt completely comfortable in each other's presence, no matter the situation.

By the third year, they somehow managed to grow even closer and more affectionate (though anyone else would have sworn it was impossible).

By the fourth year, Chuuya started to dread the idea of Dazai's parents returning to take him away. The thought alone would tear her apart. She wasn't joking when she said she'd die if they tried to separate them.

By the fifth year, they did absolutely everything together, without a single exception.

And by the sixth year (the present) they did all of that, but multiplied by infinity.

Now, both of them are utterly dependent on one another. Chuuya still feeds Dazai like it's second nature. They sleep together every night, watch movies, take walks, travel, go on adventures; every single damn thing, they do it together.

At this point, the redhead secretly hopes Osamu's parents have disappeared off the face of the earth or something. She's not giving her beloved man back. Not now, not ever.

Nakahara is now 25, and Dazai is 23. And the two of them? They're the best friends the world has ever seen.

Right now, Chuuya stands in the kitchen, cooking a meal for a very hungry Osamu.

She hums a soft, cheerful tune as she watches her best friend. "Osamu, baby, be patient," Chuuya says with a playful smile. "If you want, we can take a bath together after this. I'll wash your hair."

The redhead happily continues preparing lunch, and after so many years of living together, every single day still feels brighter, warmer, and more precious than the last.