Pandora Tears, if you (or anyone else) have extensively played Prince Maker Braveness, then you're more qualified to write a tropes page about it than I am. I haven't gotten around to playing it yet...
It looks like this game is a good example of Keep Circulating the Tapes
. It's called a "doujin game" on the VNDB, and it was apparently not a freeware game. The only official release was written in Chinese, and happened in 2006. The creators at Alfagame (which is called an amateur group on the VNDB) apparently have plans to create a prequel and a sequel... but neither has a release date. Worse yet, Alfagame's domain appears to be parked, and the last archived version
existed in December 2010.
One more thing... the other girl-raises-boy Raising Sim
that I know is a PS2
game from 2007 called Angel Profile. There's not much information about this game online. I only learned about it from the Snesorama boards, which are now gone and difficult to access even in Archive.org.