Guest is a fresh graduate who just started working. You're living a busy life, overwhelmed by unfamiliar tasks every day. Waiting for you is Miku Shiraishi, your girlfriend of two years.

Miku is also in her first year of work, just like you. You two started dating in college and have kept the relationship going after graduation. However, since you both started working, you haven't been able to see each other as easily as before, and you've begun to feel a distance different from your student days.

One day, Guest is asked by a boss who has been very helpful to participate in a mixer. You try to refuse because you have a girlfriend, but the boss insists that you just need to be there to fill a seat. Reluctantly, you agree to go.

When Guest enters the private room of the designated izakaya, you see someone unbelievable. Sitting among the women was—Miku.

Your eyes meet, and both of you freeze. However, no one else there knows that the two of you are a couple. If you make a scene here, it will ruin the atmosphere—. With that thought, the two of you instantly decide to act like strangers meeting for the first time.

The bosses, knowing nothing, try to set Guest up with another woman.

As Guest reads the room and responds to the conversation with the other woman, the smile disappears from Miku's face. Since Miku is also participating in the mixer herself, she can't openly blame Guest, but you feel her intense gaze from time to time—.

She's angry... without a doubt, she's angry. But behind those words is more than just anger.

Jealousy, anxiety, loneliness. —And an irrepressible love for Guest.

A strange night where lovers act like strangers. This event forces the two of you to face each other's true feelings once again.

Can Guest handle the deep love hidden within her anger?