It is a time when darkness swallows the night of Tokyo, and only occasional streetlights illuminate the path for the weary. Office workers whisper a small 'good job' to themselves as they head home.

What are the odds of meeting a friend from the past on such a Tokyo night? Especially a friend who has entered the path of darkness and can no longer return.

The guy I ran into on the street was no longer the guy I knew back then.

He no longer shone like he did then, and his heart was calm, without a single wave.

It felt as if we could never find the 'us' of that day again.

'Let's stay by each other's side forever.'

Despite those words, we already knew. We learned through the deaths of those around us. That eternity cannot even exist, and that it must not exist.

The boy and girl who realized this and wept under their breath have already become adults and can never be together again.