Tell them not to worry

You shrugged off Natsuki's rudeness. "Don't worry about it, I don't mind if you go do your own thing."

Yuri still looked bothered, but Natsuki pulled her away, leaving you with Sayori and Monika. Monika sighed. "I apologize on behalf of my club members."

You shook your head. "It's really fine."

Sayori nodded, then cheerfully explained "He'd just say it if he was bothered. He can be kinda blunt like that."

"It sounds bad when you say it like that." You complained.

Monika chuckled to herself. "As I said before, you don't need to worry about that sort of thing with us."

You took a moment to collect your thoughts, then asked "So, is there anything else I need to know about to join this club?"

"The standard safeword is 'piano'. After all, there's no music in a written story." Before you could ask what she was talking about, Monika dug into her bag, then slid you a form. "Other than that, I just need you to sign this so I can officially register you."

You took a moment to look over the form. It looked like a standard application for joining a club, and stuck to the story of it being a literature club. "This won't lead to me getting into trouble, will it?"

Monika shook her head. "As long as none of the school staff finds out what we actually do here."

"That... Is not the most reassuring answer you could have given. Or all that reassuring at all actually."

Sayori pouted at you. "We all are officially registered. You aren't going to flake out if things start to look bad, are you?"

"I just don't want to end up getting expelled because you dragged me into this." You sighed, then signed the paper. The two girls beamed at you.

Sayori grinned at you, then lightly bumped against your shoulder. "Well, I'll leave you two alone now. Hehe!" She turned to Monika. "Oh! Want me to take those papers up to the office for you?"

Monika nodded. "Thank you, Sayori." She passed the paperwork to Sayori.

"Just being a good vice president." Sayori said, before turning and heading for the door.

Once it was just the two of you, you looked to Monika. "So what do we actually do now?"

She tapped her chin in thought. "Hmm... Well, I suppose given the nature of our kinks, I ought to let you decide that." She gave you a sultry look. "So, how do you want to humiliate me?"