The numerical suffix (e.g., "306") indicates the chronological position of the release within that label's history.

The prefix (e.g., "NSPS") identifies the production label or a specific thematic series.

When a production features multiple established performers like Matsuno Yui, Kirihara Azusa, and Uehara Yu, it is often marketed as an ensemble or collaborative project. Each performer typically represents a specific professional profile:

Nsps306 Matsuno Yui Kirihara Azusa Uehara Yu -

The numerical suffix (e.g., "306") indicates the chronological position of the release within that label's history.

The prefix (e.g., "NSPS") identifies the production label or a specific thematic series. nsps306 matsuno yui kirihara azusa uehara yu