Japanese online retailers have recently been listing that the fourth manga volume of Oshiete! Galko-chan will have a special edition bundled with an original anime DVD on December 22nd. It should be noted that Seven Seas Entertainment licensed the manga and will start releasing it in North America starting on November 22nd. The manga mind you began releasing June 27th 2014 and has since then been ongoing publication, an anime adaption for it would later be released on January 8th 2016 and end March 25th 2016 with 12 episodes releasing for the anime series. The series plot summary can be seen below quoted from MAL:
Meet Galko. Tall, buxom and fashionable. She’s popular, and is viewed as a bit of a party girl. Although she can be sharp-tongued, she’s a good person. One of her close friends is Otako, who is Galko’s polar opposite. Small and frumpy, Otako likes to sit in the back of the classroom, but is somehow very close to Galko. To complete the trio is Ojou, an airhead from a rich family.
Oshiete! Galko-chan is a short anime about the daily lives and humorous discussions the girls have about various topics and myths regarding girls’ bodies.