"Hey, Izu..." Mina began hesitantly as her boyfriend held her hand and guided her to the spot, "Where exactly are we going?"

"Dagobah Municipal Park," Izuku replied simply, causing Mina to brighten up slightly.

"Oooh, I've heard good things about that place!" She replied. "I wish I could meet whoever came around and cleaned it up-it looks so nice now!"

Izuku chuckled nervously in response. "Haha, yeah. I bet they're, uh, a really cool guy." Mina cocked her head in confusion, but nevertheless walked with Izuku until they were on the beach, and later moved to the absolute end of the boardwalk. When he was certain nobody was in earshot, he turned around to face Mina, holding his hands in hers.

"Alright, so, you're probably wondering why we're here."

Mina nodded. "I mean, it's a pretty spot, but...I couldn't help but notice you got a little tense when you suggested we go on a walk earlier."

Izuku nodded in turn. "There's a really good reason for that, which I'm going to get into in a moment. It...it wasn't an easy decision to make. I didn't...have anyone who could make it any easier for me," He said sadly, reflecting on fairly recent events. "I thought long and hard about it, about whether it was really necessary to share what I'm about to share with you, or whether it would be better if you didn't know. But...at this point, especially with how crazy things have gotten with me lately, I decided that it would be more dangerous for you not to know, and come to the wrong conclusions, or for...something to happen, and you to not have enough information as to why."

Mina looked up at him, her expression indicating that she was just about completely lost. "Izu, what's going on?"

Izuku took a deep breath, again checking if anyone was around. "Okay...here goes," He said before looking her in the eyes. "I was Quirkless."

Mina chuckled nervously. "Uh, yeah, I know. You said that you were late. That you only developed your Quirk during the Entrance Exam."

Izuku gulped nervously. "Yeah, but...what I said wasn't entirely...true."

Mina became confused once more, a question evident in her features, which Izuku moved to answer.

"Yes, I first used my Quirk during the Entrance Exam, but...it didn't develop. I trained like hell for ten months before I finally got it-that's why this beach is so clean now. But my Quirk was given to me by...someone else."

Mina thought the statement over for a minute before her mind settled on the only possibility, and began to connect the dots. Izuku using his moves, him spending less time teaching, him losing his power, him no longer being around…

"All Might," She said, shocked beyond expression. "So...you really were Quirkless, your whole life?" Izuku nodded.

"Yeah. You remember that sludge villain I told you about? The one that tried to possess Kacchan?" Mina nodded. "After All Might defeated him once again, he came to me...and he told me that my attempt to save Kacchan was what inspired him to act. And then he said...that there was a way that I could become a hero."

"Giving you his power," Mina said, to which Izuku nodded again, before holding up her hands. "B-but wait a second. If you have his power, what about those black whip things during the joint training exercise? All Might's never done anything like that."

Izuku nodded. "All Might's Quirk, One For All...it wasn't his Quirk, either. He was Quirkless, just like me, until a hero from the older generation, Nana Shimura, took him under her wing and gave him her power."

Mina began to understand what was going on. "So...this Shimura lady, or somebody else, had to have had that super strength power, and somebody had to have had that whip power. And they've been passing it down to other people like an Olympic torch or something."

Izuku nodded. "Basically. This Quirk...I'm the ninth user of it."

Mina's eyes widened. "The ninth?! But...if a new user is chosen roughly every generation, then-"

"'It must be from when Quirks first emerged?' Yeah. ...Yeah, it is."

"Whoa..." Mina said, awestruck. "Nine users...up to seven Quirks to juggle around...that's just...crazy." Soon, a thought occurred to her. "But wait, you never explained why All Might never used those whip things, or anything else he must have gotten."

Izuku chuckled. "I only just found out recently myself, which-oh, wow, that's a whole other thing to explain there, huh?" Mina just cocked her head before Izuku elaborated. "The long and short of it is, the way One For All works, it only just manifested the capacity to use the Quirks of its previous users after I took it. Up until that point, it had been more basic."

"How so?"

Izuku cleared his throat before he explained. "You remember that big villain All Might fought at Kamino?" Mina nodded. "That villain, All For One, has a Quirk that lets him transfer Quirks between himself and others. Both taking them away...and giving them to others, unwillingly."

Mina's eyes widened again. "I thought that footage looked weird. Like he had more than one Quirk that he was using."

"Yeah. And among those Quirks is an anti-aging Quirk. He's been alive since the dawn of Quirks, using his Quirk to gain power over others and the country at large. However...he also had a brother, one with a strong sense of justice, who appeared to be Quirkless. To get him to submit to him, he forced a Quirk onto him which increased the physical abilities of its user. Strength, speed, stamina, durability-the works."

"The power that All Might displayed," Mina said in understanding, to which Izuku nodded.

"But, as it turned out, the brother did have a Quirk-one which let him transfer his Quirk to others, through his own DNA. And when he got that other Quirk, the two somehow fused together into One For All."

Mina nodded. "So with every new person, it made them stronger and stronger, until they could finally put a stop to that All For One guy."

Izuku nodded. "That was the mission."

"And eventually, this Quirk his brother had, to transfer his own Quirk..."

"The theory is that the power stocker Quirk had been enhancing that capacity, that 'Transfer' Quirk, with every new user, allowing each of the other users' own Quirks to be transferred, but only making them usable now that it's my turn."

Mina nodded before she showed confusion once more. "Wait, 'the theory' rather than 'my theory?' W-why did you say it like that?"

Izuku got somewhat more nervous. "O-okay, this is going to sound crazy-well, almost as crazy-but...the other users? They're...all in my head."

Mina's eyes widened. "You can speak to the dead?!"

"N-not...exactly! They're more like...A.I.'s. Mental imprints of who they were, with all of their memories and experiences intact, and which I've sometimes spoken to during extremely stressful situations." Mina still looked at him with some slight concern, causing Izuku to elaborate it. "It's the second user's Quirk. She called it Legacy-she could create imprints of people in her mind by ingesting a sample of their DNA. I haven't quite gotten the hang of using it yet, but...I've been working with it in private. Eventually, she told me, I'll be able to talk to any of the users I want to in real time, which should help me a lot in mastering this power for myself."

Mina nodded slowly, a dazed expression on her face. "Y-you must realize this is a lot to process."

"I know. I still think it's important that you know all of this. Both because I don't want to lie to you about who I am anymore, and also..."

"Also..." Mina said, prompting him to continue. After a moment, he steeled himself and did just that.

"What happened to All Might...it's made me worried that this whole struggle between the League and Heroes is reaching a tipping point. That...the mission isn't over."

Mina's eyes widened. "B-but that All For One guy is locked up in Tartarus, isn't he? Nobody's ever broken out of there! And as long as he's locked up, all you have to deal with is Shigaraki and his thugs! With All Might's power, you could take them all, right?"

Izuku looked back at her hesitatingly. "I'm...not sure. Everything that's happened recently-that high end Nomu, other attacks, what happened to All Might-suggests the League's a lot stronger than we think it is. And with the kind of power he's displayed...I'm worried that All For One's captivity is entirely by choice."

Mina could say nothing as Izuku continued, "As it stands now, I have to be prepared for the possibility that I'm going to be called upon to fight against All For One, and Shigaraki. That...I might not be ready to do so, that I haven't become powerful enough to face them like All Might could. And, if I end up succumbing to his fate...I need you to know all of this. I need you to understand everything about who I am, how I got to where I am today...how I met you."

Mina took a deep breath, still struggling to process everything that Izuku had told her, before nodding. "...Okay. Okay. Thank you...for feeling you can trust me with this. It...it really means a lot. But...just, promise me one thing, okay?"

Izuku nodded, some of his habitual nervousness returning. "N-name it."

"...Be careful. Okay? I-I know that this is a really huge responsibility for you, one I'm...honestly not even sure I get entirely. But just, please...don't go rushing to make yourself one more sacrifice. I...I don't know if I could deal with that. ...Please."

Izuku considered her words before nodding firmly, pulling her into a hug. "Absolutely," He said, as the two held each other tightly against the setting sun, and the sound of the beach's gentle waves.

And Day 2 is done! The prompt here was "Beach," which I decided to take in a more dramatic direction. Stay tuned for new fics the rest of this week, and thank you all for reading!