Not much to say for this prompt, it's short, sweet, and I just love the idea that OP goes to Griffin Rock to relax, so of course he'd bring June with him if they're dating. Enjoy!
June had never really experiences a "postcard perfect" fall.
Growing up in Nevada, the temperatures didn't really lend themselves to leaves slowly changing to vibrant reds, yellows and oranges before falling to the ground. And when visiting family out of state, it was always either summer and the trees were green and lush, or it was Thanksgiving or Christmas and the leaves had already fallen off.
So, when Optimus suggested a picnic date on Griffin Rock, June had to fight to maintain composure. Once they had crossed the groundbridge, made their pleasantries to the Burns and the Rescue Bots, and headed out onto the forest, however, she was grinning as widely as Raf had when the Bots had taken the kids to an Arctic snow day.
Once far enough from town to avoid detection, Optimus transformed and the pair walked among the trees, June taking delight in the snap and crunch of them under her feet, and even dancing through a shower of leaves when a gust of wind knocked them down.
"You seem to be enjoying yourself," Optimus said after she had done that, smiling his sweet smile at her.
"I've always loved fall, or at least the idea of it." She tilted her head back to look up at him, a hand at the back of her head to keep her hat on. "This is the first time I've gotten to properly experience it, and it's better than I'd dreamed."
"Then no matter what else happens today, I accomplished my goal." He knelt down and reached for her, brushing his curled knuckles against her side. "All I want is to make you happy, June."
June leaned against his digits, nuzzling against the top one. "You do, Optimus. Very much so." She beckoned him to lean down, and pecked a kiss to his lip plates when he was close enough. "There is no place I'd rather be, nor anyone I'd rather be with, than right here with you."
"I feel the same." Optimus returned the kiss the best he could, then stood up. "Come, it's not much further."
They had their picnic on a lovely outlook with a gorgeous view of the island and the ocean, only heading down when the sun started to sink to the horizon. As they made their way down the mountain, however, they heard some loud noises and, after sharing a look, went to investigate.
What they found was the Rescue Bots and the Burns in a clearing, with the largest leaf pile June had ever seen. It went up almost to Optimus's waist, and as they approached, Blades dropped more on top, while the bottom was shaped a bit by Bolder before they turned back to their root modes.
"Optimus Prime, sir!" Heatwave said, giving a salute that Optimus quickly dismissed. "And Ms. June." He nodded to where she was sitting on Optimus's shoulder.
"What are you all up to?" she asked, looking around.
"Cody told us it's human tradition to jump into piles of fallen leaves," Chase explained. "So we gathered all the raked leaves on Griffin Rock to make our own."
"Except the piles still in yards," Blades added. "We made sure to leave those alone."
"I think you mean 'leaf' those alone," Graham said, laughing while Kade groaned at the pun.
"We made a human sized pile too, so we can jump together," Cody said, pointing to a much smaller, though still large, pile that was off to the side. "You wanna join us?"
"I'm not sure if we should…" Optimus glanced at June for her response.
"I'll do it if you will." She leaned in to whisper into his audial. "And if you do it, I'll scrub away all the leaf dirt once we're home."
Optimus managed to keep his engine rev quiet, but June could feel his plating warm under her. "Alright. I will join you." He set June on the ground and joined the Rescue Bots at their pile, while June joined the Burns family, linking hands with Cody and Dani.
"On the count of 'jump'," Charlie said. "One. Two. Three. Jump!"
The explosion of leaves could be seen from town, though luckily the peals of joyful laughter didn't carry quite so far.
