Go get some rest

Izuku couldn't stay there much longer and socialize with the others. His entire body hurt due to the multiple bruises he had kept, Recovery Girl's Quirk had exhausted him further, and then he was suffering from an adrenaline crash after being so nervous about posing nude and erect in public. It was just too much for his poor body; even at its peak stamina, his mind was stepping on the brakes.

"I'll... be going, then. See you guys back at the dorms." He said to no one in particular, just hoping they wouldn't worry about him the same way they seemed to worry about Jiro. He was used to having others worry for him, and being honest, he'd rather reassure people. Saving everyone with a smile, right?

AH-HAH-HAH-HAH!

All Might's laughter played on his mind, a common theme when he wanted to make himself feel better. It really worked like a charm.

Finally, some time for himself. Just him, the onsen, and very sore muscles all over, even as the rejuvenating waters slowly soothed his pain. It was always good to find some space to be alone in. It gave him time to think, mull over his next steps, and figure out how to correct his mistakes.

This is going so much faster than I hoped for... Uraraka, Kodama, Recovery Girl, Jiro and Midnight-sensei are all under Attraction of Hot Things' sway. Yet... while Midnight was all too happy to, erm, stroke me, and Kodama flashed me her boobs on her own, Uraraka and Jiro behave almost the same, just closer or warmer... it's as Recovery Girl said, it's not actual mind control, just a predisposition that I can turn into mind control through my thoughts, somehow. I'm slowly adapting to my sixth sense of danger, but it's got no use on targets too fast for even it to keep up. And while my body isn't exploding like All Might said it would, I'm still getting so bruised in serious fights that Recovery Girl can't bail me out. I'm still too green, truly...!

"Yeah, I'd say you're right, but it's your first week as a hero student, take it easy."

...

His eyes slowly traveled from the waters in front of him to those further ahead, noticing someone else was bathing with him. The First User, more specifically.

"Ahahah, did I surprise you? Since you can use One For All, my Quirk, you can see me like this if I choose to communicate with you. So... rough day, huh?" The water around her was perfectly still, making her presence feel uncanny and supernatural. Which, yeah, she had been dead for like a century by now, go figure.

Another figure showed up next to her once the steam clouds from the onsen cleared up a little. A woman with distinctive facial scarring and a real badass look to her, sporting a knowing smirk and twitching cat ears. She did not displace the water around her either; another ghost?

"Yo. Shinomori Hikari here~ Also known as Fourth User of One For All and all that jazz. I'll take explanations from here, since Harem Protagonist Girl over there took too long last time." Izuku's cock throbbed harshly against his chest, a dollop of semen slowly pouring into the water. The least he needed in his current state were two gorgeous, naked women in an onsen in front of him. Yet, they didn't seem to care about how pent up he was, and Hikari just kept going without minding him.

"So my Quirk is called Danger Sense. You've already used it so many times that I can manifest like this so soon. I have your sorry, danger-seeking ass to thank! So, seriously, thank you. You have no idea how weird it feels to uh, not exist for sixty years or so. It's fucking weird." While he tilted his head, she gave him no time to dwell on existential dread. "Anyway! Danger Sense is a nifty Quirk. It senses threats to you and others in your surroundings, and even boosts your muscle memory and reflexes a little so you can avoid it."

"Yet, it's now both turboboosted by One For All, and linked to your Quirk. The former expands its range considerably, and lets you tap into the muscle memory of eight others. By the time you master it, you'll have the reflexes of All Might on top of all of us combined. Untouchable won't begin to describe it. As for your Quirk... well, that got weirder still. Apparently, Danger Sense is triggered by people that are under Attraction of Hot Things, as long as they think directly about you... and then lets you read those thoughts. Who knows how that'll look like when you master it."

Another, longer line of thick semen slowly seeped out of Izuku's cumslit, not even orgasming as much as passively leaking out due to how overfilled and productive his testes were. "Okay, okay, I get it, cut it short. I still gotta explain All Might's Quirk, though!" The First User just laughed, apparently amused by the state of his cock.

"It's called Heroic Body. It's how he mastered One For All so fast. Your body will behave like the peak human condition for your age bracket would. So a four-year-old born with this Quirk will be as strong, fast, nimble, resistant, and so on, as the strongest, fastest, nimblest or toughest four-year-old in the entire world, absent Quirks. Of course, that's just passive; if you actually train, you start becoming passively superhuman at the categories you train for."

The First User chuckled a little, continuing the explanation herself. "You get it, don't you? Physical categories include sexual ones. Penis length, girth, erection strength, cum volume, production, virility... you are superhuman in all of these traits, some more than others, which implies you've been 'training' them quite a lot~ But that's enough teasing, I do promise to give you privacy when you request it." The red-faced boy nodded gratefully. She sure could be forward if she wanted to.

"We don't quite know how Attraction of Hot Things has affected Heroic Body, since All Might has not materialized within you yet. Similarly, there is something keeping the other Quirks locked beyond your control. Maybe it's your hold over One For All itself, and they'll show up once you start mastering it. Either way, I hope your harem is doing well, and that you can give that piece of meat the relief it direly needs~"

With a final giggle, the two were gone, right as another small spurt of cum poured into the waters. That was a lot to take in.

"Midoriya." Aizawa approached the green-eyed boy as he was coming out of the bathroom. "Recovery Girl sent me a message just now, explaining something about a side effect of your Quirk." He swallowed hard, cold sweat running down his cheek. Did she reveal One For All's secret...? "Apparently, it causes some nasty buildup of energy if you're too close to the same person for too many days in a row, little by little. So she's sent me an ideal plan to spread that energy around in tolerable amounts."

Huh?

"Tonight, you'll be sleeping in Uraraka Ochako's and Tsuyu Asui's room. Tomorrow, that will change to Manabi Sakuya's and Shinohara Kiyo's room. The day after, you can go back to your room, then alternate for two more days and so on. Any questions?"

Huh?!