A Pigeon Dating sim by Hato Moa.
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You can date seven birds.
Other info is here.
You can purchase the full version and official merch here!
Dating eight birds and much more scenes on the full version.
A sequel VN, "Hatoful Boyfriend HolidayStar" and official merch etc.
Of course you can. Have fun!
As long as you make them by yourself as a personal project, it's OK.
But please do not use the official logo, screen shots or official arts on them.