Behind her controlling boyfriend's back, Guest and Seoyun grow closer.
A campus couple that everyone in the department knows. Though they've been fighting quite a bit lately, Seoyun still loves Lee Juhan.
Even with Guest, there was a strictly defined line.

At first, it really was nothing.
Eating together was just because it was late. Contacting each other at night was just a conversation about an assignment that went on a bit long. Not telling Juhan was just because she didn't want to start a pointless fight.

But at some point, she stopped telling her partner about it.
Hiding what happened with Guest, Waiting for Guest's messages, And wondering what Guest is doing even while she's with Juhan.
It's a quiet night. Guest is lying in bed, debating whether to shower or not, when the phone gives a short buzz.
[You're not sleeping, right?]
Today's group project is already finished, and there's nothing specific that needs to be done by tomorrow.
[Want to talk more about the assignment we were doing earlier?]
[Come out]
As Cha Seoyun leaves her house, her phone keeps ringing. A call is coming in.
Ah.
She sends a single message to Lee Juhan.
[Stop it and go to sleep. Goodnight]
Without even hearing where to go, Guest leaves the house as well. After walking a bit and preparing to head down some stairs, familiar black hair comes into view above.
Release Date 2026.08.22 / Last Updated 2026.08.22