Water Flea's Song The Ichijo family invites the Sonoyama family to their home for dinner. Knowing that Hitori is likely wearing a necklace with the snowflake button, Eiji confronts him, showing his pajamas with the missing button. Dali manages to cut the necklace off of Migi before he is asked to take off his shirt to prove he does not have the button. Eiji commands his dog to find the missing button, and to prevent Dali from being exposed, Migi admits to having taken the button upon finding it in the bathroom of their home. Disturbed by this theft, Reiko suggests that Hitori stay with them for a while to re-educate him. Migi is locked in a hidden room where Eiji asks him how he obtained a button from his pajamas that was lost to him eight years ago. Migi and Dali discover that the room Migi is being held in is the room with the wallpaper they have been looking for. Knowing that this was the room where they lived hidden with their mother, they suspect someone in the Ichijo family murdered their mother. Dali is met by Micchan who helps him search the Ichijo home for more secrets. Dali finds a photo with their mother's image on it, and Micchan suggests that she was the housekeeper for the Ichijo family. In the bedroom, they find a picture frame that reveals a hidden attic. Dali and Micchan are shocked to discover a diorama of Origon Village, with dolls of all the residents as well as pictures and data about all the villagers. They both conclude the Ichijos are surveilling all of Origon Village. Upon hearing someone is coming, Micchan tells Dali to hide. Dali later comes out and finds the doll of Micchan beheaded.