>>1452016it's called kagaku na yatsura by yoshikawa hideaki. yoshikawa hideaki did two other series, both involving girls with huge boobs, slim waists, and thunderthighs, but this manga has the biggest breasts by far.
it's a real shame it's not more scanned. has two volumes out now but only 3 or so chapters are scanned, you can find it on ex-hentai.
the best part about this particular manga is that unlike some other manga where the biggest-breasted girl doesn't get much screen time(i'm looking at you, maken-ki), in this one she's given the majority of screen time. the artist clearly knows what his readers are after. beware tentacles/monsters though.
