"Hey honey, I'm home." Diluc greets the firekeeper.
"Hey darling. Would you like a bath, some dinner or... me?" She decided to play along.
(A.N. Don't ask why the firekeeper knows about modern day tropes.)
"I'm sure we both know the answer to that." He says with a smile.
"What brought on the sudden roleplay?" The firekeeper question.
"Y'know, just practicing for the future." Diluc laughs after finishing his flirt, the firekeeper joins in.
Diluc had gotten to the point where he didn't know if the firekeeper was just teasing him or was actually interested in him. Women are confusing creatures so he didn't trust their teasing.
He then goes on to tell her all about his exploits with Seigward and such, telling her that his fight with the Abyss Watches would come after two more bosses.
Their conversations went everywhere from laughing at grandma's loud snores to the meaning of life. He spent a long time in her company and was certainly enjoying himself.
Diluc knew he'd wake up in about 2 minutes, in which case his body would disappear from the firelink shrine and he's wake up on his soft bed. He decided that it was now or never, the conversation wasn't going anywhere after all.
He started to stare at her. Feeling the stare, she returned it through her mask. Neither of them said anything. Diluc leaned in and... their lips touched. However, before he could actually get into it or start to use his tongue, he was teleported out of the firelink shrine.
He woke up quite frustrated, he picked that time specifically so he wouldn't need to deal with embarrassment if she rejected him but he didn't think about how much he'd want to continue if she accepted it.
Regardless, life goes on. He went to school and slept like a sloth the whole day. Once the torturous day had ended, he met up with Momo and Izuku and went over to her house.
Now, something he hadn't thought of occurred. The fragile, shy Izuku was now face-to-face with Father Yaoyorozu. His eyes were summoning tears but was interrupted by Momo kicking her dad in the shin.
"Dad! You're scaring Diluc's brother! Take your frown somewhere else!" She complained. An arrow shot through his heart as he fell to the floor, completely heartbroken. His daughter had abandoned him.
They all walked over the old man's corpse and Momo led them to her personal gym. It was massive with every possible machine installed; every muscle could be trained with any variety of these machines.
Thankfully, working out had purged Diluc's mind of his and the firekeeper's failed? Kiss.
Izuku was pitifully weak, he was having difficulties holding 5kg weights. But that was why he was here; he was going to become the next One punch Man!
After the long workout, it was time to have a bath in the hot springs. Although Momo had asked Diluc to come in the bath with her, he adamantly refused. He didn't mind joining her when she was a decade older but he isn't a pedophile.
Izuku had already gone into the hot spring as he was the most exhausted while both Diluc and Izuku were about to go into their separate baths. Before they did though, Diluc had something to say.
"Hey Momo, I have something to ask." He said with a serious tone. Momo understood that it was a serious question and steeled herself for what he was about to say.
"I'll probably have a harem in the future, are you ok with that?" Diluc asked. Momo's face went from serious to shock, then to happiness.
"You dummy! I thought it would be something serious. Of course, you can! Dad said the best pro heroes can get multiple partners if they want to!" Momo said. Now Diluc is very confused. He had never heard of heroes having multiple partners before. Unknown to him, this was because Father Yaoyorozu said to her that pro heroes usually have multiple partners as in sidekicks but she misinterpreted it in the romance way. Poor Momo.
Regardless, he now had the green light. While in the bath, he started to think of the future. Diluc daydreamed about when Momo was older how he'd walk into her gym and see her all sweaty, a smile came to his face. And then began to think of the FBI, is it legal to daydream of a future version of your fiancé when she's underaged at the moment?
Unfortunately, the FBI didn't take into account time travel into their laws so he was free to daydream as long as he wanted.
Both Izuku and him had arrived home, Izuku severely sore and Diluc ready to talk to the firekeeper some more, and also ask her out officially.
He went to sleep with a smile on his face and woke up in firelink shrine. Diluc looked around and found the firekeeper sitting down while smiling at him and beckoning him over. He walked over with a confident stride but internally he was terrified of her possibly rejecting him after the kiss, he wasn't very experienced with romance in his previous life.
"Take a seat." She said softly. He did as she asked and sit next to her. She immediately grabbed and pulled on his ear
"You little scoundrel, taking a maiden's first kiss and running off like that! If you're going to do it, you have to make her want more! Like this." She finished her sentence as she pushed her lips onto his. Neither of them opened their mouths but she leaned into the kiss which made it seem more intimate than a simple kiss on the lips.
"See? You have to lean into it to show the girl that you aren't messing around. So, from now on, you'll have to learn and get better." The firekeeper said with a huff and puff in her voice. Diluc's mind blanked but quickly cleared.
"Got it, I'll be sure to practice more with you." He responded. Diluc was ecstatic that they'd be doing this more in the future.
"Good. By the way, this place is to crowded to do anything more. So, we'll have to wait for you to usurp the flame so I can leave." She spoke. This excited Diluc even more, she had just told him that they'd be going further, no one man should have so many flirts directed at him at once from a single woman.
"Already thinking about going further? How vulgar." He teased in return; he wasn't going to be the only one caught off-guard.
"Well of course I'm thinking of going further, you just proposed to me after all." She dropped a bomb-shell on out fragile protagonist. His mind blanked. At what point did he propose to her?
"Uhhhhhh... When did I propose to you?" This was something that you shouldn't say, even if you don't know how you did it, just marry the girl and move on. This was a lesson that our protagonist is about to learn.
"Hmm? You think taking a maiden's lips mean nothing? Do you take them so often and then abandon them?" The firekeeper was obviously becoming aggressive.
"Wait, wait. I didn't mean that I didn't want to marry you, it's quite the opposite. I'm just not sure how you propose here." Diluc defended himself. The firekeeper sighed.
"Thank god I didn't need to kill the man I just married. Here, when you kiss a woman to any capacity, that's considered a marriage proposal and if the woman initiates another kiss it means that she's accepted." She explained. Diluc sighed, he was glad that he hasn't kissed another woman in this world. That was when a certain white-haired masked woman kissed his cheek. Diluc didn't see her approach so he was spooked.
Yuria had kissed him on the cheek in response to him kissing her on the hand. And now they were married. Yuria and the firekeeper 'looked' at each other even though neither had direct eye contact.
"It seems that we are both married to the same man now Katherine." Yuria said.
"So, it would seem Yuria." The firekeeper responded.
'Ah nothing like a crazy day where I accidentally marry two beautiful women and learn the name of one of them after marrying them.' Diluc taunted himself.
"Well honey, I am now your partner. I'd like to hear about your so-called secret now." Katherine demanded. Yuria didn't know what she was talking about but looked intrigued.
"Hmm... Yes, I'd also like to know." Yuria affirmed.
"Wait, before I do. How do you two know each other. And didn't you speak differently from now?" He said while pointing at Yuria, her speech was much different from last time they had met.
"I'll answer that. We were both raised in the same place for the same purpose, in order to become a firekeeper. Firekeeper's were trained in order to talk like a noble, apparently Katherine didn't stick to that after meeting you, My Lord." Yuria explained. Katherine nodded.
"Ok, I'll explain my secret. But beforehand, I need to say that I am already engaged to someone else." Diluc explained, he was already exhausted from this day and just wanted to sleep.
"I thought as much. I expected you to propose to me much earlier if not." Katherine nodded in response.
"Now, I must ask you to explain this so-called secret." Yuria asked. And thus, Diluc told the secret about the real world. He explained his world in great detail but didn't talk about how he was reincarnated.
"I see..." Both of them were perplexed by this information.
"So, you're 5-years-old?" Yuria asked.
"Basically." Diluc replied. Both of them sighed.
"We have to wait a decade then?" Katherine asked Yuria.
"Yeah, it seems that way." Yuria replied.
"What's up?" Diluc questioned the context to their conversation.
"Your world's rules state that you must be 16 in order to have sexual relations to older women. So, we must wait longer than we wanted to." Yuria explained.
"Then what's the minimum age for this world?" He asked in response.
"Well, there is no age restriction on marriage. Usually, if an older woman married an 'underaged' man as you call it, every week or so after they turn 11, the woman would test if the male could produce semen. Other than that, they would have a normal relationship in which they can decide when they want children." Yuria further explained.
"I really hope this next decade goes by fast." Diluc mumbles. Both Yuria and Katherine smile in response.