S to M no Sekai, Shoujo Kakumei Utena Recommendations
Being Chiho Saito & Be-Papas works, these manga have countless similarities.
Apart from the same gorgeous art, sensual scenes, and raffinate atmosphere, both have plenty of romance, drama, evil bishounen, sword fights, and magic/fantasy elements.
In both the main character is a pretty schoolgirl with some kind of special power.
The main difference is that Utena has shoujo-ai hints, while World Of The S & M has a tragic shounen-ai story in it.