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A flat chested coodere succubus who gets jealous of other women who have bigger boobs than her so she calls those women "boobed women" who is constantly being shipped with her imouto or otouto, Vinjot and calls people "Urusai" because she doesn't want to be called a flat chested succubus despite being actually true then tries to crush at least one bone of your body.
Girl: You should do incest with Yukino
Guy: Vinjot isn't into flat chested succubus

Yukino:URUSAI *Crushes Guy's feet*
by TatsuCiao March 03, 2016
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