Kono Hi, "Itsuwari no Yuusha" de Aru Ore wa "Shin no Yuusha" de Aru Kare wo Party kara Tsuihou shita

[MangaDex]

 

[Diamona]

Another mangaka makes a fundamental error; you complete the events leading up to the main story in the FIRST chapter. Everything prior to the main story events are chapter 0, and a waste of newcomers' time who want to know what the series is about.

 

[DementisXYZ]

Another mangaka makes a fundamental error; you complete the events leading up to the main story in the FIRST chapter. Everything prior to the main story events are chapter 0, and a waste of newcomers' time who want to know what the series is about.

Alternatively, it means "here's the current status quo, but don't get comfortable, because we're going to destroy that and lead into the actual story." Based on chapter 3, that's exactly what's happening, especially since there's a huge disconnect between the plot synopsis and where the plot currently is.