Taking turns.

"Well..." Ochako said. "How about we take turns?" Izuku shot her a confused and concerned look. "We each put an entry in for the other, or maybe ourselves. We can share what we write, but I wouldn't mind keeping it secret until we pass the book."

"We'll have to actually tell each other," Izuku said. "The note doesn't save one-time commands."

"Fine by me," Ochako said, despite turning a little red. After a moment of silence from both, Ochako merely said "Y-you can go f-first."

"You-you sure?" She merely nodded, not wanting to say something stupid. "Okay." Izuku opened up the book and thought for a moment. It has to be something perverse, but it needs to be something simple. Izuku tried to think back to everything he had done with the note, but that just led him back to his first kiss. Their first kiss. Izuku then stood up and started writing.

"Ochako Uraraka wants to kiss Izuku Midoriya as she did this morning, if not more so if she truly wants to."

Barely a moment after he stopped writing, Ochako gently grabbed the book from his hand and closed it. She dropped it with her right hand as her left arm went around Izuku's neck as she pulled him in. Izuku followed suit and wrapped his arms around her head as both of them closing their eyes. Unlike their first kiss, Ochako didn't waste a second tunneling her tongue into his mouth and Izuku soon found himself doing the same. Given that both college students had a competitive edge to them, they found the idea of battling for control to actually be as fun as it was erotic, with the two constantly switch between noises of dominance and pleasure.

Izuku's eyes shot wide open when he felt Ochako's right hand fondle his balls, something he didn't know how to respond to. I... I didn't write for her to do that.

"You like this?" Ochako said as seductively as she could. Izuku nodded, still processing. "Good. I want you to enjoy this." Without another word, Ochako went to work.

As the kiss went on past the thirty-second mark and they paused for some air, Ochako found herself a strategy: she'd lighten up on her right hand until she thought Izuku had control for too long, then she'd "tickle his fancy". And if the moans he gave her were any indication, he approved of this.

However, after they broke for air for the third time, Izuku gave her an almost sinister grin. Ochako wasn't sure what that meant, but she felt strangely excited to resuming kissing. She was caught off guard when his hands didn't go around her head, but that paled in comparison to the shock of him grabbing her butt. Firmly. Despite not a word being spoken (as their mouths had reconnected), the phrase "it's payback time" ringed in Ochako's head.

That voice proved to be right. Any effort Ochako had to stimulate him was undermined by how sensitive to his groping she found herself to be. What started out as the two of them trading dominance, which she then turned into a dance where he followed her lead, was now a battle for survival where his erratic (and erotic) hold of her cheeks disarmed any hope she had to keep control of their mouths.

This keeps getting better and better. Ochako thought to herself.

Afterwards, they both accepted that they were done kissing for the moment, but one look into each other's eyes made it clear the night was just beginning. "So, Ochako," Izuku picked the book off the ground, "I think it's your turn."