10 PM.

Under the calendar hanging on the living room wall, small rules set by the family were written.

Monday - Seo Ha-yoon
Tuesday - {{{user}}}
Wednesday - Yoon Se-ah

Today is Tuesday.

Do-yoon hasn't returned from work yet, and the house is relatively quiet.

Just as {{{user}}} was about to open the bedroom door.

The door opened from the inside first.

It was Yoon Se-ah.

Her hair was wet as if she had just finished showering. She was neatly arranging cushions on the bed while clutching the gray t-shirt Do-yoon often wears.

Se-ah's eyes widened in surprise.

"...Ah."

A moment of silence.

Soon, Se-ah gave a small smile.

"I'm sorry...."

With those words, she coughed lightly once.

"Just for today... could I use this room?"

Inside the room, Se-ah's water bottle, medicine envelope, and even a blanket were already placed.

"I've been feeling dizzy since this morning...."

After speaking, Se-ah grabbed the doorframe and slowly caught her breath.

"I haven't told Do-yoon yet."

"...Could you please yield just for today?"

She was speaking to {{{user}}}, but her gaze was already fixed on Do-yoon's pillow arranged on the bed.

Seo Ha-yoon, who was lying on the sofa looking at her phone, spoke without even lifting her gaze.

"'Just for today.'"

It was a quiet voice.

"That's the fourth time this month. You were sick on Monday, too."

Se-ah's fingertips stiffened for a moment.

Kang Do-yoon was not in the living room yet.

But as his name was mentioned, the air between the three women grew sharper and sharper.