Have her clean his dick while he considers more.

"Why don't you go ahead and lick my dick clean while I consider what to do from here?" Sylvain asked, and Mercedes nodded enthusiastically.

"Of course, whatever you want!" she said brightly. She got off the bed and fell to her knees, fondling his balls as she began to lick at his shaft. Sylvain smiled as he once again looked over the Note.

He began to once again consider his options. He had Mercedes here, completely compliant, bisexual, and willing to essentially be in a harem. Now the question was, who to go after next?

His own housemates, Ingrid and Annette were obvious choices. Might be fun to mess with Ingrid some more...

Then there was the Golden Deer girls. That could be a lot of fun, Leonie was a bit of a tomboy, and Sylvain wouldn't normally go after her, but the Note could add a fun twist. Marianne was rather shut in, but maybe he could break her shell a little... Lysithia was still out, until a few months passed, and maybe not even then. Going after a girl right after she turned 18 might be bad taste. Hilda was a definite though. He found the idea of making such a normally lazy woman his maid pretty hot and entertaining.

Then there were the Black Eagles. Edelgard was out until he got Hubert's full name, otherwise, he was just asking for a knife in his back. Dorothea... Oh yes, definitely, she was too hot to pass up. Petra was also a great option, she was certainly an exotic beauty. Bernadetta was also a potentially interesting choice, possibly even more of a shut in than Marianne, but again, he doubted the Note couldn't fix that, though he didn't want to mess up a girl's personality too much.

He looked down to see Mercedes had transitioned to straight up blowing him and moaned. Yeah, this was definitely great. He knew he was going to enjoy using the Note immensely.