Hell, I've known a couple personally. Usually I find what they want most is breast reduction surgery though, because it's no picnic carrying those around (backaches, chronic migraines, grooves cut in the shoulders from bra straps, etc.).
Also knowing an American F cup personally, who had to get a reduction due to back issues, the big breast tag usually makes me feel weird. As soon as the big boobs are revealed I'm like "Oh jeeze, that would hurt to have." Nice thing is, some insurance companies cover reductions completely.
Anyway.
I always enjoy this mangaka. Just generally quirky and slightly-unbelievable stuff, that make for great one-shots. And such cute art.
Ack! That sucks... yeah... I don't know what to say. But I hope your friend (and friends/acquaintances) are okay now.
But... yeah, all I really wanted to say was that I appreciated how the 'sort of ridiculously big natural boobs on a lithe, slim body' trope in certain (ahem, or a LOT of) mangas and animations/concept art for women was dealt with in this story (that is, with humour.) Particularly with NSFW stuff because big boobs generally look really weirdly drawn and drooping all over the place (idk, to me, I have no idea how really huge boobs look in real life, and I don't mean any offence to anyone if that's how they look like. Srsly.)
Anyway, I know that I should not really get so picky about body images of fictional characters in sexual fantasies of all things. But... sometimes I do it anyway. :/ Dahp.
... I JUST LIKED THIS ONE SHAWWT OKAYY.