本剧以高仓家三兄妹为中心展开故事情节。高仓冠叶（木村昴 配音）和高仓晶马（木村良平 配音）是患有绝症的妹妹高仓阳毬（ 荒川美穗 配音）的兄弟二人，他们对妹妹非常疼爱，而医生却让他们做好随时失去妹妹的准备。一次他们带着阳毬去了水族馆游玩，但在游乐场内， brothers suddenly discovered that the sun did not see the death, but was pronounced dead after resuscitation. They immediately took Yang to take care of it at home and soon they received a strange package. When they opened it, they found three funny penguins inside. These three penguins were very cute, but only the three brothers could see them. The mystery behind this phenomenon has become a turning point in their lives. 本剧以高仓家三兄妹为中心展开故情节。高仓冠叶（木村昴 配音）和高仓晶马（木村良平 配音）是患有绝症的妹妹高仓阳毬（ 荒川美穂 配音）的兄弟二人，他们对妹妹非常疼爱，而医生却让他们做好随时失去妹妹的准备。一次他们带着阳毬去了水族馆游玩，但在游乐场内， brothers suddenly discovered that the sun did not see the death, but was pronounced dead after resuscitation. They immediately took Yang to take care of it at home and soon they received a strange package. When they opened it, they found three funny penguins inside. These three penguins were very cute, but only the three brothers could see them. The mystery behind this phenomenon has become a turning point in their lives.