Have you looked for Locked Heart? Simpler story and fewer characters, but still gives the same vibes as Cinderella Phenomenon. (Dicesuki was also a creator of it, but it's enlisted on a different creator page in Itch.)
yes, i found locked heart while i was searching for a similiar game like Cinderella Phenomenon ;) then i found out that it was also from Dicesuki.
Indeed, I see both as great games that have only the most minor critique because they excel in every aspect!