Submission doesn't sound too bad

Kurumu weighed her options. On one hand, she could try to fight back. If she didn't, her entire school harem plan would die right here. On the other, she could surrender. The purpose of the harem plan was to ultimately find her 'Mate of Fate', soul mate, destined partner, whatever you wanted to call it. And the way she was feeling right now, she was starting to come around to the Incubus pinning her to the bed.

"Ummm... I'll take the ki-" she began uncertainly before Tsukane went forward and planted a kiss right on her lips. She could feel it in the instant, her tongue entering his mouth as he did likewise in a display of wrestling. She had still been undecided, but that was being washed away. This guy was perfect~! Screw the harem plan, she only needed him! As he broke lips with her, she could feel the heat rising in her. "P-please... do me..." her succubus tail was out and wagging.

In spite of himself, Tsukane couldn't help but grin. He didn't know if this was his incubus powers talking or if he had always had this side buried deep down, but right now he was going to lay into the succubus in front of him like... he was going to lay into her. Similes are hard when you're horny.

"Take off your panties." He told Kurumu. When he didn't release the pin of her arms, she gave up on trying to get out from under him and simply used her tail to drag her panties down her legs, leaving them dangling off of one. Tsukane let his hands up to drop his pants, quickly pulling out his very erect dick.

Unbeknownst to either of them, Moka was outside the infirmary, watching through the window. She did a tiny little fist bump as she watched Tsukane take charge of the situation: the plan worked perfectly! She really wanted to walk in there and masturbate to them having sex, but that could ruin the mood she'd helped set up! She'll just have to stay outside till they finish, making sure not to look suspicious in the hallway.