Well even if this is WHY Viyuden is breaking up (because this guy is still just a rumor), at least it seems like it is in moderately good terms because it's not a "scandal." If it was, we would've known the moment they were breaking up and there would've been a stupid press conference with Rika saying "Sorry" and they probably wouldn't wait until June to do it.
Plus, I thought they weren't so harsh on older members (or Elder Club members)? I guess I was wrong.