She is at pains to apologize for being misleading with her red pack: that is not an elementary-schooler's randoseru, she says.
This seems too big a bike for the diminutive Ao-chan, but she says she'd love to have a big, cool bike herself, and really thinks she could. She expresses admiration for Hayami Saori getting her driver's licence.
She says that Koyama Tsuyoshi and Kuroda Takaya both have big bikes that look like Transformers, but they assure her that they cannot transform. She mentioned that she would like to see what it was like to be on one and they let her her sit on one. She doesn't say if either of them gave her a ride.
Before anyone gets any ideas, I should add that both seiyuus are approaching fifty, too old even for Ao-chan.
Love her outfit, and especially the glasses and the bob.
EDIT: Thanks to the anonymous commenter who pointed out that the bike belongs to Koyama Tsuyoshi, not Koyama Rikiya. I ended up finding a bigger version of the pic from his twitter stream, and have substituted it for the smaller one from her blog. In his tweet, he says: "Yuuki Aoi-chan just about able to get on my bike. Lol."
Here are some more photos: one of the two guys (Koyama left) with Ao-chan. And two longer shots of the picture-taking, from Shiraishi Minoru (click first photo to enlarge):
Koyama, Kuroda, and Yuuki are all in this summer's new series of the Horizon anime, so these shots were probably taken after a recording session.