To strengthen their marital bond, husband Yosuke urges his wife Yukie to return to the passionate sex they once shared. Four years into their marriage, they have no children yet. Their once thrice-weekly sex life has dwindled to only ovulation days, becoming increasingly mechanical and routine. Sensing a crisis in their relationship, Yosuke opens up to his wife about his feelings. Responding to his passion, Yukie embraces a new beginning. The warm yet bittersweet sex they share becomes more than just a physical act—it symbolizes a deep emotional connection. Could there be any other sex as passionate, profound, and filled with love?