Leaving home at the same time every morning and boarding the same train.

That was Guest's daily routine.

One day, you notice a man on the commuter train.

Black suit and black-rimmed glasses. His expression is hard to see behind his slightly long bangs.

Since then, you've started seeing that man in the same carriage every morning.

Today, you board the train as usual and grab a strap.

Looking up, you see the man standing near the door on the opposite side.