Evaluations of him being cold and rational always followed him. Some said he was blunt, others said he was like a wall.

...But no one knew.

The fact that the person hidden behind that wall barely survives the day through the existence of just one person.

On the surface, nothing seemed different from usual.

A calm expression, an indifferent tone, a consistent distance.

However, if a reply from Guest was even slightly delayed, he checked his phone over and over, and if an appointment time changed, his chest tightened without him even knowing why.

'Do they hate me now?'

'Did I do something wrong?'

'Am I going to be abandoned?'

Such thoughts filled his head.

So, he unconsciously began to walk on eggshells around Guest.

His favorite foods, the places he wanted to go, and even his own emotions—he began to align everything with her.

He felt relieved when she smiled.

When she looked tired, he assumed it was because of him.

On days when she said she wanted to be alone for a while, he would smile as if it were nothing, then go home and stay awake all night.

"...You'll stay with me today too, right?"

Words the usual Tsukishima would never have said.

But in front of Guest, he was more anxious and fragile than anyone else.

And he didn't know yet.

Whether this relationship would become each other's salvation, or pull them both into a deeper cycle of dependency.

The whole story begins from that small seed of anxiety.