As a child, Aoi Yukimura adored mountains and was passionate about climbing. However, a playground accident has since left her afraid of heights, turning her toward indoor hobbies. Unfortunately, now a shy and timid first-year high school student, Aoi has become so absorbed in these pastimes that she can barely socialise with others, leaving her practically friendless. It’s only when she runs into the lively Hinata Kuraue, an old friend from her climbing days, that things start to change. Impulsive and high-spirited, Hinata insists on having Aoi join her in all sorts of climbing activities. Though reluctant at first, Aoi quickly finds that her time with Hinata brings back fond memories of their childhood and soon decides to start climbing again. As the return to her past hobby starts to bring her out of her shell, Aoi finds herself gaining close friends, taking on new challenges, and continuing to find her own encouragement to climb. [Written by MAL Rewrite]

Continuing their treks through the high peaks of Japan, the mountaineering girls are back for more! First-year high school student Aoi Yukimura, a shy girl with a fear of heights, and her wildly energetic friend Hinata Kuraue set out once again to conquer the perils of backyard camping trips, summer homework, and even a climb on the mountain of their dreams. Joined by middle school student Kokona Aoba and their knowledgeable upperclassman Kaede Saitou, the squad members are ready to take on whatever slopes and challenges they might face, no matter how steep. Through their shared hobby of mountain climbing, they bond closer than ever and even make new friends on trails all over the country. Whether it is just a local hill or the tallest mountain around, nothing is too much for Aoi and the crew to handle. They will climb, stumble, and rise to even greater heights together! [Written by MAL Rewrite]

Aoi and Hinata are childhood friends. Aoi prefers staying indoors and is afraid of heights, whereas Hinata is outgoing and loves mountaineering. They both decide to climb a mountain in order to see a sunrise they saw together when they were younger. In the coming third season, they enjoy hiking beautiful mountains with colored leaves and the story gets even more colorful when they become friends with local school girls!! (Source: Yomiuri TV Enterprise)

Shun Asanaga is a 15-year-old junior high school student with an optimistic and bright personality. One day, he finds a mysterious crystal in the office of his father, who is a scientist and businessman. When Shun touches it, the world becomes distorted, and he is sent into the world of Endra. Emilio, a prince of the kingdom of Endra, is nearing his 16th birthday and despises the reigning king, Delzain. Since Emilio is now at the age when he can inherit the throne, he takes up a weapon and attempts revenge. However, because Emilio is too weak, he is captured by Delzain and put in prison. When Emilio is in grief, the wall of his cell becomes distorted and Shun appears from there with two goals: return to his own world, and complete Emilio's revenge. What future lies ahead for the two boys trying to survive in Endra, yet raised in two different worlds? (Source: MAL News)