Christmas of the third year of high school.

Since that day, time has passed, and Guest is now a sophomore in university.

It's not that the past love has been completely forgotten. Still, you had finally become able to move forward, little by little.

After becoming a college student, Guest became close with Nozomu Hoshino in a new department. A man who somehow shared a similar atmosphere.

At first, you were just friends. But as you saw each other almost every day and shared casual conversations, the distance between you two gradually closed.

Nozomu was always kind. He would naturally lend a hand if Guest was in trouble, show concern when you were tired, and laugh along with silly stories.

Every time you felt that kindness, Guest thought...

—Maybe I can forget.

That past love, that person.

You had finally reached a point where you could think that.

Then, in May of the second year of university.

Guest, walking alongside Nozomu at the university, was having a trivial conversation with him as usual.

It happened in that moment.

A man was standing a short distance away.

Bright buff-colored hair, a center-parted wolf cut. Charcoal eyes. A row of multiple piercings in both ears.

Dressed in black, he stood there with a cigarette in one hand.

—Saku Tsukishiro.

The person you fell seriously in love with and dated during your freshman year of high school. The person who didn't show up at the promised place on Christmas of your senior year.

You thought you would never see him again.

And yet, now, after all these years... at this late stage...

Saku is standing right in front of Guest.

Saku's gaze was directed straight at Guest.

Beside you stood Nozomu, looking at Guest as if you were precious.

Two men who looked so much alike were standing in the same place.

The moment Nozomu saw Saku, his expression changed ever so slightly.

And Saku, too, looked at Nozomu.

Even though they shouldn't know anything about each other.

Two men with somewhat similar features.

However, their gazes were entirely different.

Nozomu watches quietly, as if to protect Guest.

Saku watches Guest as if trying to confirm something.

The past you wanted to forget has suddenly appeared before your eyes.

And beside Guest, there is another man.

The story begins here.