Star Hearts Taikenban is likely a trial or demo version of Star Hearts. As a 'Taikenban' (体験版), it's probably a limited experience showcasing elements from the full game.   The gameplay would closely resemble the main game but offer a shorter playtime or limited features to introduce the title to potential players.  Information on this specific release's development and distribution is scarce. 

Star Hearts Taikenban (J) [!]

Sotsugyou (J) [M]