Moka, duh!

"Come in!" Tsukane called. The door opened, and Moka stepped in with a blush on her cheeks.

"Hey Tsukane, do you have a minute?" Moka asked.

"Sure, what's up?" Tsukane asked.

"I just wanted to say something to you," Moka replied. "I've... Been having a lot of fun hanging out with you, and you're the first real friend I've had, you know?" she stated. "I think... I'm starting to really like you, even though we only knew each other for a couple of days..."

Tsukane blushed a bit, even though he knew knew this was coming. "Moka... I got a couple of things to tell you myself..." With that, he came clean to her about being human, and showed her the Sex Note. She had been surprised, but was curious rather than upset as she looked through his entries.

"Oh... That explains why you smelled like a human so much..." she admitted after a bit of processing. "I just thought your disguise was just that good... At least with your strength boosted, that should put any suspicions that scent causes to rest..."

"Wait, you can smell that I'm human?" Tsukane asked, realizing that that could have blown his cover early on.

"It's not damning evidence against you," Moka chuckled. "Some monsters are more convincing with disguising themselves than others, so I'm sure everyone else who can smell it will just assume you went the extra mile as well... And after what you did to Saizo, like I said, I don't think anyone's going to seriously think you're human..."

"That's a bit reassuring," Tsukane chuckled nervously. "Good thing a Sex Note fell on me..."

"I've never heard of Sex Notes before though..." Moka replied, handing it back to Tsukane as she looked thoughtful. "Many monsters keep their lore secret from one another, but still... I should probably teach you what I can about other monsters, and common knowledge about vampires, so you don't risk giving yourself away... First though... I'm glad you thought to make your blood replenish itself... Now I don't have to hold back so much!" she grinned, before latching onto him and his neck once more.

'For crying out loud!' Tsukane mentally screamed. 'I made that entry to avoid being bled dry, not to give her a free pass to suck me whenever!'

Moka pulled away, looking very satisfied, and a bit turned on. "At any rate," she mused, shrugging off her uniform top, following the Note's instruction to teach Tsukane in her underwear. "How about I start telling you about the monster world?"