areola breast_hold gate:_jieitai_kanochi_nite_kaku_tatakaeri haneru naked rosario_+_vampire_capu2 shuzen_kokoa yao_haa_dushi

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It does seem like these girls are bound to be from various shows rather than original (especially with their faces cut off like that), but they're not labeled on pixiv, so it would be kind of hard to figure out who's who...
tagged the 1st and 5th boobs. thought the 7th was misa ackermann, but the hair was wrong
cant tell if the 4th is moka, or lala or that vocaloid. too many pink haired boobie mobility platforms to choose from.