At first, I thought this was a Saki doujin, but then they were talking about panties, so can't be !
Joking aside, Momo talking like some pseudo gangsta felt seriously weird :/
I'm guessing it's an attempt to localize her "~su" verbal tic, which comes off as a bit childish. The Crunchyroll subtitles had her randomly insert plurals at the end of words, which is a bit better.
I also like the "Two frikken' months line." If you read the Tsuruga bonus chapter, Momo laments that there's still things about Yumi she doesn't know yet, but Kanbara says Momo shouldn't be saying that, since she's only known Yumi for two months.
last edited at Jul 21, 2019 10:32PM