/jp/ - Otaku Culture

Pick your incident
>all bust sizes increase at the same rate (to big, huge, gigantic or further beyond depending on your preference)
>bust sizes increase relative to normal size (flatties only gain some boobage, while non-flatties gain immense boobage)
>magic milk expands breasts when drunk, which also makes the drinker lactate the same milk. spreads like a virus and Reisen/Yamame/Urumi/whatever is patient zero.
>chest size swap between flat characters and boobie characters
>age swap (lolis become large-breasted hags, and the hags become flat lolis)
>breast expansion youkai gives girls big boobs and then beats them in danmaku because they can't dodge his attacks