I've been looking for one for about 6 years now. Light-ero (No nudity, aside from panties). It's an interview format, and the girl is 18. Pretty (of course) but she has some slightly crooked teeth iirc noticeable when she giggles.
She's on a couch wearing a bathrobe or black lounging kimono, and she eventually reveals her big belly, playing with her navel due to it popping out quite nicely.
Camera also shows her thighs/crotch pretty closely. I think she wore a frilly white/pink pantsu.
The only other thing I recall is the text that appears at the beginning (in Japanese) saying something to the effect of: "It's 8:30PM, and we're getting an interview with (girl's name), 18 and Pregnant". Something along those lines.
If anybody remembers this, or has it, please please, for the love of god, link it, post it. Thanks.