Unaired episodes included in the third and fourth Blu-ray/DVD volumes. 
Entry includes: 

1) Bottom-Tier Character Tomozaki: Post-game equipment for girls is a little different than usual 
After stopping for lunch at the café where Kikuchi works, the gang chats about love and dating while she tries to listen in--and stay out of sight. 

2) Bottom-Tier Character Tomozaki: Most strange spell names have unknown origins 
Aoi, Mimimi, and Tama reminisce about the early days of their friendship and a fireworks show that provided the inspiration for Tama's nickname. 

(Source: Crunchyroll)