Aoi & Mutsuki: A Pair of Queens

The second season of Uchuu Kaizoku Mito no Daibouken. Aoi was raised as a normal boy on Earth. Little did he know he was the heir apparent to Mito, the Queen-turned-Space-Pirate of an alien race that chooses their sex at puberty! Aoi fell in love with Mutsuki, the police officer who was chasing Mito