An [[original]] character by [[Natsumyun]], probably the same girl with a character in his doujin CG set, "Oniichan wa Imouto Sen'you no Semem Tank":[http://www.dlsite.com/ecchi-eng/work/=/product_id/RE137431.html].

She is an imouto with [[black hair]] in [[twintails]]. She is generally seen wearing a [[serafuku]].
rina (natsumyun)