The way it’s uploaded is confusing, since it’s not all one manga, but the most recent ...

The way it’s uploaded is confusing, since it’s not all one manga, but the most recent sequel (Hidamari ga Kikoeru: Shunkashuutou) is ongoing.

This is the order (as of now):

1. Hidamari ga Kikoeru - 1 vol
2. Hidamari ga Kikoeru: Koufukuron - 1 vol
3. Hidamari ga Kikoeru: Limit - 3 vol
4. Hidamari ga Kikoeru: Shunkashuutou - Ongoing