Sorry to say this but although many people find him gay (bad dancer / annoying, etc), I can only see Ayu in relationship with Shuya. They have this co-dependent kind of relationship, they are totally relaxed towards each other, they seem to understand each other withough words, Shuya is totally caring towards Ayu while she is so natural next to him, she tends to touch him in several photos or punches him humorusly, she always laughs hard in his company and he also is allowed more than others, just like last time in China (Taiwan?) during some promotion he kissed her on her head.
We often search for some ideal, sexy guy we they don't see people next to us who really care about us (not saying that Shuya isn't sexy

). Personally I'd prefer to have the kind of relationship that she has with Shuya than just some handsome guy I've yet to known. But it's just me