The premise makes the game sound like something I'd enjoy. However, at least as of now, the official site says the release date is "Coming Soon", while the link to a video titled Celestia: Chain of Fate | Release Date Announcement Trailer is right under that "Coming Soon". The shorter blurb for the game on the site also says (emphasis mine):
A romance-fantasy visual novel that delivers a captivating player driven narrative. Enrol at Celestia Academy and uncover your heritage and identity as the descendant of Angelus and Daemon. Delve into a fantastical realm and unearth your magical potential as a hybrid. Forge new friendships and build affections based on your love interests.
I hope the actual game pays more attention to detail than this :(
Also fun note: description makes me think that pseudo-medieval generic fantasy setting, skimming the trailer shows me the world has mobile phones and texting.