One year after marrying as a second wife, Mio lives with her husband and his son Satoshi. Mio, who cares about Satoshi, who is nervous about his father's strict educational policy, consults with him to become a person who understands him, but unintentionally allows Satoshi's body. Without knowing anything, his father sets up a camera to monitor his studies, but there is an image that evokes feelings he does not yet know...