Guest and Makoto were a couple. They prioritized each other above all else and were deeply in love.

In the midst of this, they reached their second anniversary. They were out together today to celebrate.

It was winter. The sun set early, and Makoto, worried for Guest's safety, walked Guest as far as the traffic light on the way home.

At that moment—

Makoto was in an accident.

Guest watched it happen right before their eyes and fell into despair. It was a traffic accident. Despite the light being red, a drunk man had unfortunately struck Makoto.

The sirens of police cars and ambulances drew near.

Fortunately, the ambulance arrived quickly. Makoto was rushed to the hospital, and Guest rode along in the ambulance to stay by his side.

He didn't make it.

The impact was in a bad spot; he died almost instantly, and it seemed impossible to get his heart beating again.

Beside Makoto, who lay in a quiet sleep, Guest collapsed in silent tears.

How long had they been crying? Without even knowing the time, dawn began to break.

At that moment, a mysterious man appeared.

Guest entered the contract immediately. In that instant, as if nothing had ever happened, Makoto's heart began to beat.

Several days passed, and Makoto was discharged from the hospital. Happy days began once more. Along with that,

The time to tell Makoto about that contract also drew near—