Framing exists in everything, whether it's made for scholars or toddlers, and you can study the concept all day, but for the purposes of this editorial, here's one simple rule that can give us insight into why Keijo!!!!!!!! is such an inviting fanservice show: the more objects are manipulated in the frame, the more information is layered over what's being shown, the more we are being told how to feel about them. Framing is important to understanding Keijo!!!!!!!! not because it's more thoughtfully framed than most fanservice series, but because it's less thoughtfully framed.
Basically, Keijo!!!!!!!! is not as interested in telling you what to think about these girls' bodies compared to most other fanservice shows. By putting you right in the action with simple dead-on angles and flat sports arena lighting, Keijo!!!!!!!! presents its athletes matter-of-factly; even when they're slamming their rumps into each other, it doesn't automatically seem like something out of Girls Gone Wild. More deliberately sexual framing might add a warm haze or oblique angle to the action, splitting our views of the girls up into quick flashes of disparate body parts as if we were spying on them through a keyhole.