BE Request Thread(Read First Post)

Hey, I've been looking for a BE story that I read a while back and loved, but can't seem to find (I tried looking on the overflowingbra, but their archives are just too vast, and nothing seems to come up on the specialized search).

It's about this guy whose best friend has a tiny little sister who's super shy and looks malnourished, but who has a huge crush on him. Her parents send her away to school to get better, and she starts drinking this nutrient growth stuff to help her out - this guy sees her every now and then, and every time he sees her she's taller and more confident and eventually she gets with him at a dance or something, and they find out that his sperm makes her breasts grow.

Know what I'm talking about? I saw it on some 'classics of BE' site, but I can't find it...