[Donkey Kong]

I was TV tropes and found this example in the Breast Expansion section.

"A similarly happy-ending-possessed Breast Expansion hentai short-story involved a girl whose breasts inflated cartoonishly whenever she was sexually aroused...who has to tutor a boy she's in love with. About a minute into the meeting, her chest becomes home to twin beach balls. Needless to say, he's extremely impressed, and graphic sex follows. It too ends with them forming a really, really kinky but otherwise loving relationship."

It was under the anime & manga section. Does anyone know what is the name of what's being mentioned? Or does anyone have a link to it? Thanks in advance.