Goku had, at best, an extremely vague understanding of what was happening. He wasn't sure what exactly a wedding was, or how being married worked. He had had Chichi's father explain it to him, and the idea of staying with Chichi for the rest of his life, being hers, her being only his, it actually made the martial artist blush and look away shyly; a feat nothing else could claim to have achieved.
Still, as much as the idea thrilled him, he still wasn't sure how it worked, and certainly didn't understand that Chichi was trying to marry him that very day. He didn't plan on being around for more than another hour. He still had training to do. 'And when I'm the very strongest,' he thought with a smile, 'I'll marry her for real.'
That being said, he still wanted to try on wedding clothes. He still didn't fully grasp what the difference between clothes meant for men and those for ladies were, and even if someone ever tried explaining it he'd probably think it was stupid anyway. And so he simply put on the thing in the dressing room that caught his eye the most.
Chichi had accepted that he would be leaving for now. Upset as she was, she didn't want him to marry her and regret it because he hadn't had the chance to go fight giant monsters or whatever. She waited outside the dressing room, wanting to see him all dressed up before he left. When the door opened, and Goku stepped out, Chichi's jaw dropped.
She wasn't sure what was more shocking, the fact that Goku had actually decided to put on a wedding dress instead of a tux, or the fact that he'd actually managed to get it on properly without damaging it at all. "How do I look?" he asked innocently, oblivious to why Chichi looked so confused and surprised.
"That's a dress!" Chichi shouted. Specifically it was the dress she had been meant to wear for the wedding, hence its fitting Goku so well. It kinda bothered her how quickly he'd gotten on, as the one time she'd tried it on, it had taken her triple the time to work out how.
"So?" Goku asked, tilting his head slightly. If he weren't so fucking cute Chichi would have slapped him across the face. "You're the groom! Grooms don't wear the dresses, they were the tuxes!" She said.
Goku frowned, looking down slightly, "Do I not look good?" He asked. He knew he didn't fully understand how other people viewed looks very well, but he'd seen himself in the mirror and thought he had looked spectacular. He'd been so excited to show Chichi, and the thought that she might not like it was a little crushing for him.
Chichi sighed, seeing he was upset and reminding herself how slow he was about some things like this. "No, it isn't that, you look wonderful in it, it's just-" "I do?" He asked, his smile returning and Chichi whimpering, wondering if he was using some special ki technique that weaponized cuteness.
"Yes, you really do. Amazing actually." She said, looking him over. The dress really did fit him wonderfully, better than it had fit Chichi in fact. And he looked so cute smiling up at her, almost like a blushing bride ready to be married, and to be fucked silly on the honey-moon.
Chichi's member started to stiffen slightly at that thought. She blushed as her eyes roamed over Goku's body, picturing him being thrown on the bed, the dress being ripped from his body and her cock plunging deep into him, making him moan so loud the whole country knew he was hers…"Goku, you wouldn't happen to be wearing anything under that would you?" Chichi asked, biting her lip. Goku shook his head, "No, it feels so soft, I didn't think I needed any underwear with it. Should I have anyway?" He asked. Chichi shook her head, "No, that was a good idea Goku. Turn around for me." Chichi instructed, moving closer to Goku as he turned. Because of the mirrors inside the changing room, Chichi could see herself standing behind Goku, and could see Goku from the front and from behind in the dress. That was the last straw.
She dropped her skirt and panties, freeing her stiff cock. She pushed closer to Goku, lifting up his dress until her cock felt his soft, warm skin. Goku shuddered, realizing what she wanted and grinning, moving his hips to rub her cock. Seeing a lustful look on his face in the mirror drove her wild, and Chichi jerked her hips forward.
Goku held onto either side of the doorway as Chichi's cock pushed into his pussy, pumping into him at a steady, already rough pace. She moved forward, biting down on his neck. She wished his skin weren't so tough. She wanted to mark him as hers, but his moaning at her bite was enough for now.
Goku moaned Chichi's name as she fucked him, urging her to fuck him harder. Her hands pulled back Goku's hips as she thrust her own forward, sinking her cock even deeper into Goku's eager cunt. Soon she was completely hilted inside, slamming her entire length into him with each thrust. She hated that she was a futa and not a D-girl. If she were a dick girl, her cum could knock Goku up. The thought of Goku getting impregnated by her made Chichi cum immediately, filling her lover's pussy with thick seed.
Goku cried out when he felt it, his slit squeezing tightly around Chichi's cock, as though not wanting to let her go. They panted, turning to kiss each other heatedly as Chichi pushed Goku fully into the room and shut the door behind them. Goku wouldn't be leaving until the next morning, and Chichi would make sure he was walking funny when he did. Goku didn't mind in the slightest. Hell, he was egging her on, wanting to see her get more wild.