32-year-old Mamimi divorced just one year after getting married. A masochist who enjoys painful experiences, she escapes into fictional worlds when she isn't being dominated. Meanwhile, 33-year-old Tamaki graduated from an all-girls school and had her first sexual experience relatively late at age 20. However, she's been secretly masturbating under the covers since elementary school. As their pasts and presents intertwine, where will their paths lead?