The story does give me the same mysteries BB had: What the hell kind of game was that? Nevertheless, you gave it very 'graphic' detail. I could actually picture myself in BB's position, peering slyly around the corner of the shower curtain. Another improving detail is your use of "Statement" paragraphs, which made it alot easier to read and stay consentrated on the story line. I am impressed that you included each girl's accents (Like Starfire's sentence structure resembling a robot). HOWEVER: One thing dissapoints me. You failed to conclude the story revealing what happened to BB. Did he crawl out of the tub? Is he still in the tub? and I began to wonder when/if Bumblebee turned back to human form before being pleasured by BB. You stated that she entered the shower, surprising Beast Boy, in her Bee form. I may be missing something, but I did not read anything about her returning to size. If I missed/overanalyzed any details I apologize.
P.S. This story pitched the tent in my pants.