Hop Step Sing! - Vol. 1 Ch. 1 - Taking Flight from the Roof

[MangaDex]

 

[Oeconomist]

This series seems to have switched publishers between the preview and chapter 1.

 

[Shirobane]

This series seems to have switched publishers between the preview and chapter 1.

The publisher, both in Japan and the US, is Kodansha. INKR have sub-licensed it for streaming and their “preview chapter” is just the first part of chapter 1.