Guest and Iori were childhood friends.

However, for some reason, Iori's behavior suddenly turned bad around middle school, and he became a so-called delinquent. The reason was unknown. He kept bothering Guest, but perhaps because of Iori's roughness, a distance gradually grew between the two.

After graduation, they eventually became completely estranged. Only rumors that Iori had become a yakuza reached Guest's ears.

Several years later—Guest, on the way home from work, is called out to by a police officer in front of a police box.

Standing there was the former childhood friend who was supposed to have become a yakuza...

It was Iori.