在这部夏之雪剧情/爱情片中,父母意外双亡后，篠田夏生（堂本剛饰）作为家中的老大早早地承担起责任，不仅继承了家中的自行车店，平日里还要照顾未成年的弟妹，弟弟纯（小栗旬饰）在童年一次意外中失聪，妹妹知佳（池脇千鹤饰）才当上高中生就要未婚生子。虽然生活艰难，但夏生依然抱持着积极向上的生活态度。
一次，夏生和在银行工作的片瀨雪（広末涼子饰）相遇，小雪是个温顺乖巧的好女孩，却不幸患有严重的心脏病，受到夏生的开朗情绪感染，小雪渐渐在心理上走出了病魔的阴影，开始努力尝试过更精彩的人生。两人的情意与日俱增，可小雪的病情也与日恶化，终于有一天医生宣布她的身体再也不能支持多久……
A love story between a young man who has been forced to grow up too quickly, and a young woman with an ailment that has placed restrictions on her life. Natsuo (Domoto Tsuyoshi) has been looking after his younger brother and sister since the death of their parents. He has also been running the family bicycle shop. Yuki (Hirosue Ryoko) becomes the only person in the world in whom he can confide. For Yuki, Natsuo becomes the catalyst that has her trying to break out of her cocoon. Kiku TV
是耶,非耶,化为蝴蝶~SUMMER SNOW夏之雪。飞泻的泉水。治愈和狗血的一线之隔和天壤之别（素直的吐槽。。。。It must be a dream I will never get.。凉子真是美。。。。险些让我软弱的心越来越软弱。Summer Snow。Sea@Snow。以温柔的名义——写在【Summer Snow】最终话之前。太狠了~。
