Except that it was almost Christmas

Except that it was almost Christmas. Well, this makes the cookies redundant, but… An eerie grin flashed over Mikoto's face, but it was gone so quickly Touma wasn't quite certain it had been there at all. She was very clearly trying to play it cool, but as usual it came out as pure aggression.
"You still owe me, you know! The outburst took Touma aback, and he raised his hands in supplication.
"W-what for? Did I do something else? Recently, I mean?"
"For scar- STARTLING me, idiot!"
"I already apologized, Bir- I mean, Misaka-san, what more do you want?"
"That's NOT good enough!" She shouted before glancing all around in embarrassment. To cover her face she took a sip of her cider, not realizing that it had like Touma's cocoa heated up due to her frequent charges. As she spat out a little and blew cool air onto it, Touma reflected once more on his luck. Of course it's not. Damn it, what to do then? What made her happy last time? …Maybe something like that penalty game thing again? That was so… awkward though… For both of us… But it did make her happy, and she got us both those Gekota pendants… Hmmm…
Crap crap crap, how do I say this? Mikoto blush only grew and as she plotted. How can I convince him to do this?! This won't work if I just tell him, he'll totally suspect-
"S-say, Mikoto…" Touma's use of her first name and halting tone shook her from her reverie.
"Eh?!"
"P-perhaps… to make it up to you, we could, you know, or I-I could, maybe… just do what you want me to do for an e-evening?" Crap crap crap I hope this works. If I guessed this wrong, I'm a good as dead. Sorry mom, sorry dad, I leave everything to Sphinx! …Do they even know I have a cat? Problem for later.
Silence fell over two of them alongside the muffling evening snow as the last shreds of dusk faded to night. Mikoto had never expected that kind of offer from Touma and it threw her into disarray, careful battle plans discarded in the face of what seemed like total surrender.
"…What are y-you offering…Exactly?" What what wait what? Did I hear that? Could he… is he offering a… d-d-date!? Does he think I… want that!? WHAT!?
"I don't know! Something like that penalty game thing from last time, maybe... O-or something else! R-really, I don't know! It's just an offer; it can be whatever you want!" I'm not dead yet. Could this really be working? No sparks yet … okay. J-just play it easy… Try to give her what she wants…
Normally when faced with a similar scenario, Mikoto's embarrassment had made the direct expression of her goals and feelings impossible. But just this once, for the first time since she had met Touma, something had changed. He's just g-going to GIVE ME what I w-w-want!? W-ait... what d-do I want…? The silence resumed for a few moments more, until Mikoto hesitatingly responded.
"….O-okay…Come shopping with me on the 23rd. I-I've just realized I've g-got to do some last minute Christmas shopping, and YOU'RE GOING TO HELP ME, GOT IT IDIOT!?" Mikoto's aggressive nature finally won through, though she managed to refrain from shocking anyone named Kamijou Touma.
"Yes yes! I promise!" Well, this could be worse… especially since I'm not the one paying for anything.
"M-Meet me at 4 o-clock, at the entrance to the Dianoid! Don't be late, or… you'll regret it, I promise!"
"Yes yes! I promise again!" Oh. Now it's worse. Touma was already having flashbacks to the last time he had visited that high-class hellhole of a mall. The glitz and glam hadn't even been the worst part, considering the magical attack by St. Germaine. Still, things had quieted down in the weeks that had passed, and the boy seriously doubted something would happen again in the same place. Advertisements for the mall had been running non-stop on cable, promising that the mall's security had been improved beyond belief. The boy had no idea if the campaign was working, but if there was ever a good time to go the Dianoid, it was probably now. Plus he only had one girl, not two like last time, dragging him around. However, that one girl was Tokiwadai's railgun, who was in a league of her own when it came to causing trouble.