Aihara Tsugumu works as a Specially-controlled Medical Device Management Assistant. Then one day while spending a busy life, an acquaintence, Endou Kazuo approachs him with an offer of giving him a humanoid. He named the adopted humanoid; Midori and started their new life, but somehow they seem to be on different wavelengths... Ueyama Hisaya, his childhood friend tells him to "Dispose him" with disgust in his eyes. His repetitive and unchanging days are stirred up by head-turning events. These events bring about a gradual change in Tsugumi's feelings...