Iori Igarashi is a skilled radiology technician who has patiently awaited his opportunity to work alongside An Amakasu, his childhood friend. After securing a position at her family's hospital, he is resolved to honor a promise he made to An in their youth. Unfortunately, having lost contact for years, she fails to recognize him, a situation worsened by her dislike of his work methods. As various cases arrive at the department, she must come to appreciate his abilities and learn to collaborate with him so that patients can receive the best possible care. As the two adjust to one another, will An finally recognize the childhood friend who has been working by her side all this time?