WSS-252 – 超無垢 同級生は…まだ高校生♥ – Seko Coco (瀬古ここ) (MP4 & ISO)
Released in 2014-08-08.
Her first AV release to my knowledge.
She was born in 1996-06-07 and is 153cm tall.
She has at least worked under aliases Seko Coco (sometimes romanized as Seko Koko) (瀬古ここ) – Kokomi (ここみ) – Mizuno Kokoro (水野こころ) (she only did 1 nude idol movie with this Mizuno name).