The verified update
No. The announcements identify supported platforms but do not state that one purchase unlocks another platform version.
The evidence was checked against Natsume title announcement and is current to 2026-07-31. The date attached to the underlying source is 2026-03-11.
What the source establishes
- Nintendo, PlayStation, Xbox, and Steam are separate ecosystems
- physical selectors are separate products
- no cross-buy language appears.
Why it matters
Assume each selected version is a separate purchase unless an official listing says otherwise.
That distinction helps players make a release, platform, route, story, or purchase decision using the narrow fact actually supported by the source.
The remaining boundary
Cross-buy, upgrade, and save-transfer policies require explicit storefront terms.
Any later change should be dated and linked to a new first-party notice rather than silently overwriting the historical source.
Primary source
Natsume title announcement · 2026-03-11. Status checked 2026-07-31.