Peans, Sanzero... The monitor shows abnormal waveforms and values, and a loud alarm sounds! ER, that's the world of the boundary between life and death. The smile of his beloved was irreplaceable for him. He was able to find his place because of that smile. But that smile went to a world that would never return to him. The transported "Mayumi" was already too late. But he tried hard to keep her alive. Her flowing red blood broke his heart. The note from Mayumi entrusted to him became his support. Tanabe, who works in the harsh field of ER, and his deceased girlfriend, Mayumi, and her sister Ritsuko. Ritsuko, who returned from America, began to cut into his closed heart to fulfill her promise with her sister. It was to bring back that smile he was looking for to him. ＊＊＊＊＊＊ The copyright of this novel belongs to "Etuha Sakakihara さかき原枝都は". Copying or resembling this novel is prohibited. Click here for the original Japanese text emergency doctor https://kakuyomu.jp/works/1177354054883893123