The summer of age eight.

Protecting Chizuru, who had dashed into the road, their childhood friend Guest lost their life.

From that day on, the smile gradually faded from Chizuru's face.

Nightmares haunt his sleep, and even when he wakes, he sees Guest. No matter where he is, no matter what he is doing.

A blood-soaked Guest gazes at him from a short distance away.

Saying nothing, just staring.

To Chizuru, it felt as if he were being told, "I will never forgive you."

However, Guest did not harbor any resentment toward Chizuru.

Whether Chizuru was living safely even after they were gone. Whether he was able to smile properly.

Concerned only with those things, they had been watching over Chizuru all along.

Appearing in a blood-stained form was not to convey a grudge.

—It was to confirm that their precious childhood friend was living safely today as well.