Wanting to repay Hinata for the souvenir she got her from Mt. Fuji, Aoi invites her for a late night climb up Mt. Tsukuba to treat her to a night view at the top. Arriving at the top, Aoi resolves to once again take on Mt. Fuji.

The climb up Mt. Fuji starts to become a bit more difficult. Maybe Mt. Fuji isn't easy after all. Aoi starts to push herself to keep going. Will the girls make it to the top to see the sunrise together?

Having succumbed to altitude sickness, Aoi is forced to stay behind with Kaede. Hinata and Kokona make it and experience the rising sun atop the summit of Mt. Fuji, and walk around the caldera and to the highest point of Japan. Aoi is extremely frustrated and has to descend the mountain with Kaede, where they later meet up with Hinata and Kokona and head home together.

The girls have Honoka join them for dinner, where they celebrate Kokona's birthday together. Later that night, Honoka gives some advice to Aoi concerning her promise, and the two exchange contact info with her. The next morning, as the girls continue their ascent, Aoi and Hinata look back on their recent adventures as they finally watch the sunrise together, realising that their promise will continue forever as they keep making memories together.

After being invited to go firefly watching, Aoi and Hinata recall that they once went firefly watching when they were younger. When they ended up getting lost, they were led back to their parents by an alleged firefly, though they both have different ideas about what kind of firefly it was.

With Aoi's mother still cautious about her climbing up mountains again, Hinata and her father suggest that she invite her to climb Mount Kirigamine with them. Whilst climbing the mountain, Aoi is reminded of the mountain she climbed with Hinata when they were younger, though neither can remember which mountain it was. Hinata's father later reveals that mountain was Mount Tanigawa, leaving the girls excited to try and climb it once more.

On the day before the Tanigawa climb, Kokona, whose birthday is on the same day, gets some new shoes as an early present from her mother and decides to go on a walk to Akebano Children's Forest Park to try them out. After returning home, Kokona celebrates her birthday with her mother, who ran a little late home from work. Meanwhile, Aoi, who spent the day making a pound cake, wonders about what will happen after her dream is fulfilled.

The girls arrive at the fifth station on Mt. Fuji. They have lunch and Aoi and Kokona buy walking sticks to get stamped along the way. The climb starts and they take it easy on the way up to the eighth station.

The girls continue their climb up Mt. Mitsutouge and discover plenty of interesting things. The climb gets more difficult, but Kaede shares some wisdom with Aoi. After a difficult part, Hinata is finally able to surprise Aoi with a beautiful view of Mt. Fuji!

Aoi, Hinata and Kokona eat crepes together and talk about the past. On the way home, Hinata really embarrasses Aoi. Later, Hinata tries to make up with her but only makes things worse. In the end, Hinata has to think of a way to truly apologize to Aoi.

Aoi is depressed about not making it to the top of Mt. Fuji. Hinata and Kokona are unsure of how to approach her. How can Aoi recover from such a frustrating defeat?

Aoi makes the plan for climbing Mt. Fuji. She buys snacks and drinks for the climb the next day. Even though she is prepared, she still feels uneasy. Finally, the big day arrives and the girls make their way to Mt. Fuji.

Hinata, Kaede and Kokona meet to discuss secret plans to surprise Aoi with a special view of Mt. Fuji, and decide on climbing Mt. Mitsutouge together. They meet up with Aoi and begin the climb, but they are steadfast in keeping the surprise a secret from her until the top!

Aoi meets with Hinata and her father and gets motivated to climb Mt. Fuji. Aoi begins preparations, but her mom is not okay with the idea of climbing the mountain at night. She learns to stand up for herself and pursue something she really wants.

Aoi, Hinata, Kaeda, and Kokona meet up for a picnic at Hannou River.

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

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.

Aoi and Hinata have a camping cook-off.

In preparation for their next trip, Aoi invites Kokona over to help her cook snacks.

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

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 put up a real tent in Hinata's yard! Afterwards, Kaede and Kokona join them and they cook a meal outside together. They camp in the tent overnight and get excited about climbing mountains soon.