He gives her his shirt

Before she knew what was happening, Akira had taken off his shirt and thrown it over her head. She struggled a bit in confusion before she realized what was happening.

"Your arms." Akira said. It took her a moment before she finally realized he meant for her to put her arms through. He stepped back as she did what he said, pulling the shirt down as far as she could. It was long enough to cover her bottoms, only barely. She looked up to thank him, and her words escaped her as she saw Akira, topless. The first thing she noticed was that he was more fit than she thought. Of course, she had seen his chest before at the beach, but she hadn't really noticed it before. Maybe it was because she was hyper aware of her surroundings in this state.

"I-I, um..." her face went red and she looked away in embarrassment. "Th-thanks..."

"Are you hurt?" Akira said with concern.

"U-um...can we go upstairs first?" Futaba said. She was sure she was still flashing some of her ass out the window. Akira nodded and turned, heading upstairs. She followed.

Once they were upstairs, she sat on the bed with a sigh. She looked up to see Akira look away with a blush on his face. She then realized she was once again flashing him. She quickly crossed her legs and pulled the shirt down so hard she was surprised she hadn't torn it yet.

She awkwardly explained what had happened and, just as she had expected, he believed her immediately. He seemed relieved that this was her own fault and not the fault of someone else.

"Well, you should probably stay here for now." Akira said. "I have some spare clothes, but I'm sure if Sojiro sees you, he'll be very suspicious." Futaba nodded. "I don't have a key so I can't get to the house, and getting one from Sojiro without also raising suspicion would be difficult..." Akira trailed off, his face scrunched in thought.

So the options were, she could take his clothes to have something to wear, but if Sojiro saw, he might assume something, or she could just face the embarrassment and tell him when he came back. Akira would have to try to get his keys without raising suspicion, or Sojiro could notice Futaba was gone; many things could go wrong.

Or maybe there was another solution they couldn't come up with right now.