Yama no Susume: Omoide Present
Plot Summary: "Mount Tenran, Mount Takao, and Mitsutouge!" Aoi and Hinata look at photos full of memories from the various mountains they have climbed up to now. Suddenly, Hinata opens a treasure chest in Aoi's room and finds awkward handmade accessories. With that as a trigger, Hinata recalls the childhood she spent together with Aoi.
Other name: Yama no Susume OVA, ヤマノススメ おもいでプレゼント