[SUMMARY] - The main character, Honami, grew up in an unfavorable home environment. One day she finds a beautiful box in a deserted shed she tries to fix the torn string that tied the box, but Tsukumogami appears. Honami was wary at first, but she was relieved by his gentle smile and began to spend her days with him, feeling that she had a new family was irreplaceable to her. However, strange things happen around Honami. Because she broke her promise not to look inside the box ... Honami felt that she was in danger and kept her distance from her tsukumogami, but "Nanika" undermined her mind and body beyond her control... She asks the Tsukumogami for help, but...