I know this kind of stuff can get complicated on the booru but this very much does just look like a genderswap Hoshi Kirara than a crossdressing male with breasts.

NiceLittleDan said in comment #2584988:

I know this kind of stuff can get complicated on the booru but this very much does just look like a genderswap Hoshi Kirara than a crossdressing male with breasts.

According to the manga Kirara has boobs and that which I'm pretty sure means she's on estrogen.