Seven years into their marriage… with no children, Keiichiro's busy work schedule had led to a life where he and his wife Maria barely crossed paths. One day, Maria suddenly left home. Worried about her safety, Keiichiro visited his mother-in-law Ririko. However, Ririko didn't know Maria's whereabouts either. 'Why couldn't I have paid more attention to her?' Keiichiro berated himself. Seeing her son-in-law like this, Ririko could no longer ignore the fact that her daughter was tormenting Keiichiro…
