A Deep Kiss

Izuku was caught off guard by Kinoko wrapping herself around him, tackling him to the ground, and kissing him. While he knew this was the sex note at work, he couldn't just enjoy the moment as he felt a **** trying to enter his mind. He figured this was actually Kinoko trying to have a mushroom grow on him as well, which she all but confirmed once breaking the kiss. "That didn't work." She blankly observed. "Perhaps I gave up too quickly."

Her monotone voice left Izuku wondering if Kinoko was faking this or if her own mushroom actually brainwashed her. The fact Izuku had to fight her tongue off with his own and yet she showed no signs of pleasure made him lean more towards that she was under some sort of control. "Kinoko," he asked as he got some air, "what are you doing?"

"The mushroom wants all of us to submit." Kinoko went right back to smooching without any passion, once more to no avail. "It senses a great master in you, so we are not to hurt you."

Wait, is this mushroom actually sentient or something?! Izuku's mind started rushing as Kinoko resumed lip-locking. Wait... no, the sex note cannot create a lethal situation. I don't have to worry about this killing anyone. Directly, at least. Unbeknownst to the hypnotized(?) Kinoko, Izuku's quirk of One For All makes him very resilient to any form of mind control, and the mushrooms (while not effortless to fight off) were nowhere as powerful as Shinso's.

"You're still not submitting." Kinoko was treating Izuku more like a program that stop responding than anything. "This resilience is surely why the mushroom wants you."

Izuku looked to his left and noticed one of the mushrooms Kinoko grew was right next to him. Since Kinoko had no plan B (not that he minded that much), he was able to grab one and shove the red mushroom onto the blue one planted in her head. Kinoko immediately stopped trying to kiss Deku into submission as both mushrooms starts to shrivel up and shrink. After looking a bit dazed, she then realized the position she and Izuku were in. "wait... uh..."

"Don't worry, nothing happened!" Izuku blurted out. "It's just, you okay? The mushroom took you over?"

"Huh? Oh, yeah. It did, didn't it?" Kinoko was still turning a bit red. "Well... what happened exactly?" Izuku removed her arms from around him so they could both get up as he told her about what happened. "So I thought I could, well, kiss you into joining us?"

"Yeah." I guess she was brainwashed by her own mushroom.

"I probably shouldn't have used a Chu-shroom. In making this."

"Chu-shroom?"

"Oh yeah!" Kinoko's eyes lit up through her hair as any concern about what just happened evaporated. In the blink of an eye, Izuku saw her holding a pink mushroom. "I made this one too. It's based on mushrooms that spread between insects. I made it for Valentine's day once a year as a joke - they make the host want to kiss a lot. I place it in the genetics of this one," She pointed to the big blue mushroom they were under, "because my Chu-Shrooms only have a lifespan of an hour. This way, if students fail to free us, we'd be free in an hour either way."

Deku was in awe as he looked at her. "You're... you're really clever. You know that, right?"

Kinoko covering her face and looking away as if she were Ochako gave him the impression she doesn't get that a lot.