46 years ago Kurihara Minoru (Fujiwara Tatsuya) went to the mountains to take pictures, but never returned. Fast forward to the present and he is discovered perfectly preserved in ice. He then miraculously wakes up.

The head of the Kurihara household is now Kurihara Norihiko (Takahashi Katsumi), who is Minoru's son and 52 years old. Their is also Minoru's grandson Kensuke (Daito Shunsuke) and granddaughter Mai (Kurashina Kana). Their family is set for upheaval as their grandfather (who still looks 25, but is now 71) returns to their home.

At first Minoru can't act comfortably around his family, but as Minoru gets used to the change of times, their family comes around

46年前在雪山遇难而成为冷冻状态的爷爷，以当时25岁时的年轻样子回到了自己的家。在那之后被卷入了偶发事件里，描写着让破碎家庭能够再次复兴。

Il y a 46 ans, Minoru Kurihara s'est rendu dans les montagnes pour prendre des photos, mais n'est jamais revenu. Il est enfin découvert en parfait état de conservation dans la glace. Il se réveille alors miraculeusement. Le chef de la famille Kurihara est maintenant Norihiko Kurihara, qui est le fils de Minoru et a 52 ans. Il y a aussi le petit-fils de Minoru, Kensuke et sa petite-fille Mai. Leur famille est prête à vivre des bouleversements lorsque leur grand-père (qui en a encore 25, mais qui en a maintenant 71) rentre chez lui.