That's not Masuo. Judging by the smirk on his face it's Reita. I think you will draw it much to my taste if I gave you a details.
What I have in mind is Masuo in center with Ryoko's faintly visible in the back as she is mastermind of everything. His main 7 (there are 9 but Ryoko only knows 7) love interests on each side. They have their gem color tint as show in Lord Arch's room.
- Reiko - Yellow.
- Riku - Purple (Don't appear in real world. You have to use from Riku's image from character list made by William.)
- Maeka(Rin) - Red (You don't meet her until Kuno College but you will find what she looks like in the same document.)
- Chihiro - Green
- Michiko - Black
- Riho - Pink (You don't meet her a future map but you will find what she looks like in the same document.)
- Aoi - Blue.