***
'Kung, kung, kung.'
Eunwoo's uneven heartbeat pounded in Sun's ear.
He embraced her with one hand wrapped around her head.
His incredibly soft but robust arm held her, not missing any part of her.
She heard the sound of his heartbeat closer, slowly pounding her chest.
At the moment, when the strange resonance reached her chest, his phone started vibrating from his pocket.
'Bzzz.'
She blinked after pulling herself together.
'Bzzz.' 'Bzzz.'
The phone kept vibrating, but Eunwoo didn't let her go as if he did not hear anything.
Eventually, Sun carefully started speaking.
"Dr. Park... the phone..."
After hearing Sun's voice, Eunwoo slowly released his arms, seemingly unhappy.
Eunwoo took the phone out of his pocket and checked the caller. He answered the phone with a slightly firm expression.
"... Hello? Yes. I'll call you later."
After a concise call, Eunwoo hung up the phone with a shallow sigh.
Sun recognized his sinking face and started speaking,