Junichiro narrowed his eyes at her. He might be tired enough to start hallucinating, and annoyed enough to agree to almost anything to get to sleep faster, but he would never be that stupid, "Hell no. I wont bet with something that open ended."
Rias shrugged her shoulders, "I'm not really sure what you can offer me to ask for it."
"How about one hundred million yen?"
Rias eyes almost turned into yen symbols as she looked at him excited, "Can you really afford to pay that much when you lose?"
Now, normally Rias was not a greedy person. At least, not in the usual monetary way. However, after moving to Earth she was only to be given a small allowance plus whatever she could earn through contracts. As she hadn't been on Earth for very long yet, she didn't have many contracts for her peerage to fulfill. Money was tight and she wanted to splurge on anime, manga, and merchandise so badly it was driving her insane.
Junichiro nodded his head lazily, "Easily."
He had several trillion yen in the bank, after all. He had been super rich for quite some time and just kept getting richer as his money earned interest. Cash was only good for his line of work to a certain point. After that it was all trade. Until he'd reached that point though, he'd been selling some creations of his for billions of yen at a time. To the older supernaturals, a few billion yen in cash was chump change.
Rias eyed him with some suspicion but brushed it off. If he welshed on their bet, she had ways of making him pay. Though given his fear of her brother, it didn't seem likely that he would try to do so, "Fine. When we win you'll pay me a hundred million yen and on the very small off chance you win, I'll teach you everything I know about the Power of Destruction, including demonstrations, at a time of your choosing." She held her hand out toward him, "Deal?"
Junichiro leaned forward and clasped her hand in his, "Deal."
As soon as he spoke, a red magic circle formed around their hands signifying their bet and sealing them to keep their word. Similar to how a devil would complete a deal with someone else in exchange for payment.
Rias smirked as she climbed to her feet, Akeno following closely behind her, "Then we'll get a place picked out and let you know when to meet us. Now, if you'll excuse us, I believe it's time for us to take our leave."
Junichiro nodded and waved toward the door, "Later."
The pair of girls looked irked at his attitude, and thought a little worse of him when he climbed to his feet and walked in a different direction. It was only Rias's upbringing that kept her from trying to snoop around his entire house since Junichiro clearly didn't care that they were there.
If he'd thought about it, Junichiro would have gladly guided them out, he just couldn't be bothered to think that much, at the moment. Despite the help of the various stimulants he'd taken into his body, he was just too exhausted to function any longer. He barely managed to dispose of the butt of his cigarette and strip his clothes off before falling into his bed and passing out completely.
He didn't even notice when Rias and Akeno left a minute or so later.
Junichiro woke up nearly twelve hours later and instantly regretted it, "FUCK! Why did she come to my place when I was tired! She should have come when I was fully rested so I could be nice!"
Junichiro rolled back and forth in his bed as he went over the memories of Rias's visit to his home. He'd wanted to be nice to her, engage in some small talk, get to know her a bit better, that kind of thing. Instead he'd been a bit of a grumpy asshole, looked down on her and her entire peerage to her face, and then got himself into a duel with said peerage. He groaned and slammed his face into his pillow over and over again, "Stupid. Stupid. Stupid!"
He continued to berate himself as he got himself cleaned off in his bathroom. It wasn't until he was soaking in his tub that he thought, "This... might not be so terrible... It's not great, but not terrible."
He leaned back and stared at the ceiling, "I'm pretty sure I can beat her and her peerage. Gasper wont be there, so no cheating time stopping powers. Yeah... I think I can win. But, even if I don't, it's not necessarily a bad thing. I know I could win for sure if I didn't hold back and used all the tools at my disposal... but that seems like a waste of effort for a not serious fight. So, if I win I show Rias I'm strong and I'm certain she'll try to recruit me. If I lose, but put in a good showing, she'll likely still try to recruit me."
Of course, he couldn't actually be hurt by Rias, Sona, Sirzechs, or Serafall due to Avalon being infused throughout his being granting him immortality and godly defenses. In fact, he was so holy he'd probably make all of them flinch back if he let some of the aura leak out. However, he wasn't going to rely on the sheer power of Avalon to win, but rather let it be a competition of skill so there was some fairness to the whole thing. Just stomping all over Rias with overpowered equipment was pointless and less than entertaining. Especially when the stakes were so low, he wasn't that pathetic.
He nodded to himself, "She might not be as desperate as she'll become, but she's still pretty desperate to get out from under Riser..." He tilted his head, "I'll have to take precautions to make sure she doesn't go blabbing about me to her family. I'm willing to bet the whole Riser incident happened because Rias bragged about bagging the Red Dragon Emperor for her peerage."
"That makes so much sense... If she bragged to her parents, the ones pushing for the marriage, then they would begin to fear her actually escaping the marriage. So would the Phenex clan. They would definitely want to lock her into the marriage right away before the Red Dragon Emperor had a chance to grow in strength. Yeah, definitely can't let them know about my abilities or identity. It'll only get worse once I steal the Boosted Gear from Issei."