japanese title: あおいちゃんえっち!! 番外編
romanised title: Aoi-chan Ecchi!! Bangaihen
circle: ナスビ騎士 (Nasubi Knight)
released: 23rd December 2014
Links:
http://www.dlsite.com/maniax/work/=/product_id/RJ146852.html
http://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_075942/
As you can guess from the name this...