Aoi spends most of her time alone, but an old friend from middle school has arrived to make good on an old promise.

With the help of Hinata's dad, the girls familiarize themselves with the necessary gear to climb.

Hinata convinces Aoi they should start with a small mountain and work their way up to the big ones.

Aoi and Hinata have a camping cook-off.

Aoi meets a girl from her school who is crazy about backpacking.

It's Aoi's turn to pick the mountain, so she calls on her new friend to help.

Aoi picked the mountain but now she needs the right equipment.

Aoi and Hinata embark on their second climb and meet some interesting people along the way.

Hinata teaches Aoi, mountain manners and learns about giant flying squirrels.

Aoi, Hinata, and Kokona help each other down the mountain.

As Summer arrives, the girls make plans to go to Hanno River Beach together. While Hinata and Kaede shop for ingredients for the trip, Aoi invites Kokona over for a sleepover, where they decide to prepare French toast for the outing.

The girls arrive at the beach, where Kokona prepares tomato risotto from the ingredients Hinata and Kaede bought. After spending the day having fun, the girls take a look at the stars, becoming excited over the thought of seeing even more of them while mountain climbing.