It's about guys turning into magical girls to fight off aliens.

You can romance a 37 years old scientist, a womanizer, a giant dude that turns into a little girl when transformed, a catboy that turns into a grown-up woman and your childhood friend who's too weak so he has to crossdress to fight.

Said like that it sounds like some moe or trap work but the romantic bits are always when they're in male form apparently.

https://www.kickstarter.com/projects/sekaiproject/witch-boy-magical-piece-a-bl-visual-novel-localiza

They're kickstarting the translation and the port from Android to Steam but they haven't gotten half their goal, which is kinda sad imo.