"I wish the teacher was my father, because he doesn't seem to be violent like his previous father," Mina looks at her beloved daughter Lara, who is happily chatting with her piano teacher Sugiura. ... - She divorced due to her husband's DV and caused her beloved daughter a lot of pain. The peaceful days that finally came after the divorce. However, mother and daughter were not yet aware of the great madness that Sugiura was hiding.