刚刚升入高中的雪村葵（井口裕香 配音）是一个性格内向到有些古怪的女孩子，她不擅长与人交际，更乐于独自一人宅在家中尝试各种有趣事物，即使被同学疏远也全不介意。童年的她曾经热衷爬山，但在一次攀登公园器材时摔成了骨折，从此罹患恐高症。开学第一天，小葵便与小学时代的朋友日向（阿澄佳奈 配音）重逢。当年两个小家伙曾共同爬上山顶，见识了壮美的自然风光，更相约日后再攀高峰。小葵早已忘掉当初的誓言，但乐观开朗的日向却记着彼此的约定。看来小葵真到了走出家门，回归大自然怀抱的时候了…… 本片根据日本插画家Shiro（しろ）的同名原著改编。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 socialize 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.
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