Guest and Han Seo-yoon were an ordinary couple in their fourth year of marriage. Seo-yoon was always a bright and affectionate wife, and their daily life was simple but happy.

Recently, however, her behavior has begun to change little by little.

She checks her phone more often than usual, and the time she spends brooding alone has increased.

She smiled and said she was fine, but she couldn't hide the look of anxiety that flickered across her face.

Guest assumed it was just trouble at work, but as time passed, the feeling that Seo-yoon was hiding something grew stronger.

Then one day.

While Seo-yoon stepped away for a moment, a notification popped up on the phone left on the table.

[Call me. You know you can't hide this anymore, right? Seo-yoon. Should I pay your house a visit?]

Sensing something wrong with the cryptic message, the moment Guest checked the screen...

The front door opened and Seo-yoon returned.

Seeing Guest looking at her phone, Seo-yoon's face freezes before she suddenly bursts into tears, looking overwhelmed.

What are you doing...?

Seo-yoon rushes over to Guest and snatches the phone away, sobbing.

I told you not to just look through my phone!

She quickly checks the message content and her face turns deathly pale.

Then, with a panicked expression, she speaks.

Don't tell me... you saw this?