So...about that quirk...

"So...about that quirk..." Tomoko stared into Deku's eyes. "It seems pretty...chaotic."

"You...know my quirk?"

"Probably better than you do, by now. It's my quirk, Analyze. I can read someone's quirk and dissect it, break it down and understand almost anything about it. It even gives me some information that's not inherent to the quirk itself."

"Oh...w-well I mean...yeah, you could say that. It's certainly caused some...weird events."

"You can't turn off the pheremones completely. But they get stronger when you want someone." That explained a lot. "That's a really strong quirk all around, but it makes normal interactions...complicated. And if you keep collecting quirks your support is going to get complicated fast. I already have some ideas though, but...I can't tell what other quirks you've got unless you have them active, I think, so we'll have to go over that."

"You uh...you're fine working with me knowing what my quirk does to people?"

"I think knowing what to expect, it'll be fine. Why, are you planning to seduce me?" She grinned.

"N-no. I didn't really...plan any of them. Well...maybe one." She said sheepishly.

"Alright so lets start with making sure YOU understand everything first, ok? I'll go through that with the others too, but their quirks are mostly a lot simpler, and they probably already understand almost everything about them. Let's see...you link to anyone you get off, but you can break those links any time. Once you're linked, their quirk is put in a sort of pool. The bigger the pool is, the more powerful this quirk gets all around, so the more people you're with, the stronger you'll get. Not just because you'll have more quirks, but the core quirk actually seems to...level up, I guess. It seems to happen at thresholds: 1 extra quirk, 2 extra quirks, 4 extra quirks, 8 extra quirks, and so on. Whatever you have in your pool, you can distribute, to the people you're linked to, but anything powered up or evolved will be at a lower power...except for the quirk's original owner. So, if i'm understanding it right...anyone you give your own quirk can use it at the second highest tier you've unlocked. I'm not sure how that interacts with your pool, I need to see it on another person, but I suspect it will just share..."

"It does."

"...oh, already tested that out? Cool. For now, at your current tier, you should be able to keep one extra quirk active, give your own quirk to others, detect your links at a distance, and...that's about it for the main part of the quirk, but there's a few mutation type traits in there too. You produce strong pseudo-pheremones, especially from your fluids, that will turn on almost anyone. Especially in close contact, and even more so if they actually take in those fluids. They are also cumulative and somewhat addictive, but there shouldn't be any major long term effects of weaning someone off it. You already know about how your body shape changed, but you should also know you're very very fertile. If you're not already, you should get on birth control or start using condoms, or both. Probably both."

Deku paled. She'd already been with four girls that way.

"That face tells me you've probably not been. Hopefully you're lucky. But I'd probably reach out and find out if anything's already happened. "

Deku nodded nervously.

"So anyway, you're fairly resistant to diseases, so that shouldn't be an issue for you, at least...I think that covers everything. And like I said, I already have a couple ideas for support gear. I can modify your hero costume to help your quirks out a bit better. So...now lets go over what other quirks you have and their requirements"

Deku nodded again, and began to explain.

They talked for the better part of the two class periods that were assigned to this for the day, and in the end, Deku was quite satisfied they'd covered as much as possible about how best to support her many quirks.

Hagakure caught Deku as lunch was winding down. They had a break before the next class, so some time to talk, so they found an empty classroom for a little privacy.

"So, what'd you want to talk about?" Deku asked.

"I want to try out your quirk!" Toru said happily. "Just for a bit."

"Are you sure? It's...pretty intense sometimes."

"Yeah...and I can still turn invisible with it if I want, right?"

"Well...yes, but...your body shape will still be noticeably different in your clothes."

"Oh right...well that's fine, I just want to try it for now, you don't have to leave it that way."

"Well, ok."

Deku focused, and Toru seemingly popped into existence in front of her. Her hair was less messy than before, Deku noticed, but otherwise she looked about the same. Until a second later when her shirt bulged until it was about to burst and her skirt tented with a huge erection.

"W-wow." Toru stared down at herself. "A-and how do I um...give myself a quirk?"

"You just have to think about the quirk and focus hard on it and it should work. And doing it again should remove it."

Toru closed her eyes and a moment later, she went invisible again. She held up her phone to see herself in the camera, and laughed. "Wow, yeah, people would definitely notice this, huh?"

She blinked back into full view a moment later. "Cool!"

She closed her eyes again and a moment later Deku felt a different quirk shift to her. "H-hey what are you..."

She touched a desk with her hand and it floated upward slightly. "Hehe I knew it! You did sleep with Uraraka-chan!"

"W-well..."

"I figured one of them was her from how she's been acting around you. Did you wanna do me next?" She stopped suddenly, blushing. "I uh...wow, you weren't kidding...I didn't mean that. I mean...I don't want to do that. I'm just...horny. Are you always this horny? Oooh though, can I play with it before you change me back?" She was rambling a bit, and didn't really wait for an answer, pulling out her cock unceremoniously and beginning to rub it. "Ohh fuck..." She stopped. "Oooh I have a better idea."

Ochaco's quirk left, and Tsuyu's replaced it. "Kero. This feels weird..." A moment later her tongue shot out and wrapped around her own cock and she started jacking herself off with it. "Aahn..."

She blew her load in seconds.

Deku was stunned. No only because that hadn't ever occurred to her to try, but also because of how fast that situation had just escalated.

"I uh...are you good?" She questioned tentatively.

"Mhm...Wow. I might have to reconsider staying like this for a while."

"I think it's best you don't for now..." Deku focused and took back the copy of her quirk. "But if you still want it with a clear mind, I'll do it."

Toru blushed. "I uh...sorry. Got a little carried away there. That was a rush..." She paused. "It was fun though. Now that I know what to expect I might want to try again later. Would that be ok?"

Deku felt like she was inviting some future chaos, but despite this, answered "Yeah. That will be ok."

The rest of classes that day were fairly uneventful, but Deku knew that she needed to have a serious talk with Tsuyu and Ochaco later. She imagined she'd probably lucked out on Kimi, or it would have come up by now, but she made a note to reach out anyway, just in case.

"Oh...kero..." Tsuyu blushed. "I can't actually...I don't...I only produce eggs a couple months a year, kero." She cocked her head to the side. "And it's not for a while. It shouldn't be a problem for me."

Ochaco on the other hand, was even paler than Deku had been. She squeaked out "I can't afford a baby..."

"It's...we didn't do that much. Not like Tsuyu and me...It's still pretty unlikely..."

"I'm suddenly glad you resisted this morning." She shook her head. "I...I should be...I should be having my cycle in a few days. What about...what about you? We did..."

"I'm not sure yet. I...my cycle is weird, I think. I may ask Tomoko if she knows what's going on with it. It must be because of my quirk somehow, but she didn't say anything about it. I've only had 1 in the last few months. That's...that's weird right?"

Both girls stared. "It's easy to forget you were originally a guy, Kero."

"Yes, that's weird." Ochaco clarified. "A-are you sure it's not..."

"Pretty sure. It was already happening both before and after I was with anyone that way."

Two days later, Deku was back in the support lab picking up her new costume. She'd brought Tsuyu and Ochaco along to have a talk with Tomoko about the way her quirk worked on other people, and to try to work out if she knew anything else about how her quirk interacted with her cycle.

After demonstrating her quirk on Ochaco, and letting her look over Deku and Tsuyu again, she paused in thought. "Hmmm. Well, Takako knows more about biology than me." She stepped over to where the other girl was lost in work and they talked in hushed tones for a bit. After a while she came back over grinning. "We figured it out!"

"Your quirk is disrupting your cycles when you change." she motioned to Tsuyu. "Basically when any of you change back from Frog, it's like you just finished your period and are starting over. You normally won't ovulate until a few days after that."

"So...are you telling me..." Ochaco was blushing intensely. "That transforming with Tsuyu's quirk is effective birth control AND means not having to have periods?"

Tomoko put a finger to her cheek and thought for a moment. "Yes. But I don't think the same thing will apply when SHE is...uh...in season."

Ochaco hugged Tsuyu suddenly. "That's amazing!"

Deku had a feeling that bonus might get her a lot more like Hagakure if it ever came out.

"Anyway..." The redhead support student continued. "I've finished the first draft of your costume, want to try it out?"

"Sure!" Deku was relieved to hear that she probably wouldn't be a...mom? anytime soon, and was perfectly content to discuss hero topics instead.

"Cool. I made three major upgrades, and tweaked a few more things. One, it's now full body, the only exposed skin is your head and neck, and three small regions of cutouts, so the pheremones should be a bit more controllable. The fabric should actually wick any fluids to special tubes that will store it here..." She pointed to some tanks on the arms with a similar shape but drastically different style, to Bakugo's. "When you have Explosion, that will also work for it, and this..." she pointed to some sprayer built into the gloves. "Will let you mist it out if you WANT to use either quirk. I got the idea from a bit of Midnight-sensei and that loud annoying boy's gear."

Ochaco laughed.

"Also built into the gloves is this. " She pointed out a button. "Which turns on..." She leaned in to whisper in Deku's ear. "...a vibe. For amping up the pheremones." She leaned back out, grinning at Deku's face. "And there's cutouts in the fingertips for Zero Gravity, and two on the back for spider legs and spinnerets. I can't really do anything with the invisibility, except make it easier to remove on the fly, which I'm working on. Version 2 will have it."