i'll make a proper post abt this once i set up a watch link* but i'm so serious about tamashii no uta being a good time. you don't need to settle for the amazon series, there's already some really enjoyable live action rgg stuff out there.
the yakuza 1 stageplay, which i absolutely adore, a lot of the game's quirks are kept in-tact in a really creative way while also expanding upon other stuff (and ryuji is there for some reason)
and the prologue movie that follows kiryu & co at sunflower orphanage
and for anyone who hasn't already seen it, the 2007 miike film is a fun campy watch too
*right now it's available here on the internet archive, but the subs and quality are both meh, i've got access better quality versions that i'll try to pass around