Room 403 agreement

🌸 CHARACTER PROFILES

🌙 Haruki Amamiya (20 → 23)

Role: Idol / Senior / Later Media Production & Creative Director

Hair: Soft white hair (slightly messy, naturally fluffy, always looks like he just woke up)

Eyes: Warm amber-gold, expressive, almost too honest

Height: Tall (but slouches when relaxed around Ren)

Personality:

Haruki is a contradiction.

On stage and in public:

bright

charming

effortlessly funny

slightly chaotic idol energy

the type people instantly trust

With Ren:

voice softens automatically

becomes gentle without realizing

overly attentive to small details

clingy in a subtle way

emotionally transparent

He remembers everything about Ren:

food preferences

sleep habits

emotional triggers

silence patterns

He acts goofy (like Sasaki-style softness), especially when calling Ren:

“Ren-chan… did you eat?”

Emotional Core:

Haruki loves like a decision he keeps making every day.

Even when it hurts.

🌊 Ren Kisaragi (19 → 22)

Role: University Student → Internship → Junior Professional

Hair: Black hair with deep blue streaks (subtle, visible only under light)

Eyes: Dark grey-blue, sharp but easily overwhelmed

Height: Smaller than Haruki, lean build

Personality:

Ren is controlled.

Not cold.

Controlled.

quiet observer

emotionally cautious

slow to trust

overthinks everything

hates being vulnerable

acts “grumpy” but is actually sensitive

At the start:

avoids emotional attachment

assumes love is unstable

Later:

becomes quietly affectionate

starts showing care through actions

cooks, organizes, prepares everything for Haruki

begins smiling more (especially around Haruki only)

Emotional Core:

Ren doesn’t fall fast.

He falls deeply.

And once he does, he doesn’t know how to leave.

🌙 CHAPTER 1 — “Room 403 Agreement”

The dormitory hallway smelled faintly of clean detergent and summer humidity.

Room 403 was at the end.

The last room.

The quiet one.

Or at least—it was supposed to be.

Ren Kisaragi stood in front of the door longer than necessary.

His hand hovered near the handle.

Then dropped.

Then hovered again.

Behind him, the dorm supervisor cleared his throat.

“You’ll be sharing this room starting this semester.”

Ren didn’t respond immediately.

“…I understand.”

His voice was calm.

Too calm.

Like he was trying to convince himself more than anyone else.

The door slid open.

And that was when Haruki Amamiya looked up.

White hair slightly messy.

A half-folded shirt in his hands.

And a smile so bright it looked completely out of place in a shared dorm room.

“Oh—new roommate?”

His tone was light.

Friendly.

Almost too friendly.

Ren stared for exactly two seconds longer than socially acceptable.

Then stepped inside.

“…Yes.”

That was all.

Haruki blinked.

Then smiled wider.

“Nice to meet you!”

He bowed slightly.

Too casually.

Too energetically.

“I’m Haruki Amamiya. Second-year.”

Pause.

Then, with a playful tilt of his head:

“So… are you gonna do anything weird in here?”

Ren froze.

“…What.”

Haruki laughed.

“I mean like—bringing strangers in at night, loud music, illegal pet reptiles, that kind of thing.”

Ren looked at him like he was mentally unstable.

“I will not.”

“Good,” Haruki said instantly. “Me neither.”

A silence settled.

Not uncomfortable.

Just unfamiliar.

Ren placed his bag down neatly.

Organized.

Precise.

Haruki watched him.

Then said casually:

“I like quiet roommates.”

Ren didn’t respond.

Haruki leaned slightly closer.

“…You’re quiet, aren’t you?”

Ren finally looked at him directly.

“Yes.”

Another pause.

“…Good.”

Haruki smiled again.

Like he had just decided something.

The Privacy Promise

That evening, Haruki suddenly pulled out his phone.

“Hey.”

Ren looked up.

“…What.”

Haruki grinned.

“Let’s make a rule.”

He pointed the camera between them.

“A privacy promise video.”

Ren frowned immediately.

“I do not want to be recorded.”

“Relax, it’s just for us.”

“That is what people say before disasters.”

Haruki laughed.

“I swear I won’t post it.”

Ren stared at him for a long moment.

Then sighed.

“…Fine.”

The camera started recording.

Haruki leaned in.

“Room 403 agreement!”

Ren looked deeply unamused.

Haruki continued:

“We respect each other’s privacy.”

Ren nodded slightly.

“No unnecessary interference.”

“Yes!” Haruki said.

A pause.

Then softer:

“…And no falling in love with each other.”

Ren froze.

“…That was unnecessary.”

Haruki laughed loudly.

“I’m joking, I’m joking.”

But neither of them smiled at the same time.

The video ended.

Haruki stretched.

“Alright. Welcome home, roommate.”

Ren looked at him for a long moment.

Then quietly:

“…Thank you.”

Haruki blinked.

Then smiled slightly softer than before.

“Yeah. Anytime.”

That night, neither of them realized—

this was the beginning of something neither privacy rules nor promises would survive.

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