Unaired episodes included in the 4th and 7th DVD volumes, as included:

Hajimete no Date (Episode 1):
Mio won a pair of tickets to a green theme park in a shopping street raffle, she gave the tickets to her brother, Nao, and then suggested they go on a date with Ink. Ink was so excited about going on a date with Nao that, as usual, her imagination ran wild!

On the day of the date, she was as excited as a kid, holding the date plan Mio had given her, and before she knew it, she had gotten separated from Nao and was all alone... she was lost....

Seikimatsu Hasha! Mahou Shoujo Sou Shingeki (Episode 2):
As the new school term begins, Nao's younger sister, Mio, starts attending as a new student. One afternoon after school, as Mio was walking home, she heard a myserious voice calling for help from somewhere!

(Source: Amazon, translated, edited)