in the newest ep of Seikon no Qwaser (ep 10), there is some implyed BE. The main character is complaing that here bra woln't fit and theres a whole scene where they try to figure out if she's grown. Although they never really reach a verdict (and kinda seem to forget what they were doing in the ecchi action. This show is good like that) if you've watch the show fairly regulary, you know this character isn't well endowed by the shows standars and you can see a very noticeable difference in her bust size. The awsome thing is this change in size persists through the rest of the ep (and hopefully the series). It may have some story conetation since in the last ep that Sasha kid(I....really don't pay attention to the story) sucked on her breast and she seems to now be aroused by the thought of it happening again. or it could just be a random ecchi moment that will never be spoken of again. you can't really tell with this show. Anyways below is a link to the bakunyuu baka thread where we've tried to compile download links for each ep including this one. Enjoy.
http://www.bakunyuu.com/baka/read.php?3,7938