To celebrate a 70th birthday, two former couples reunite for a special night filled with nostalgia—but shocking revelations they've never discussed before begin to surface one after another. The film captures the determined efforts of a 70-year-old man aiming for sex after half a century. As an after-party for the milestone celebration, two ex-couples gather at a private home, reminiscing about the past while quietly rekindling old emotions. When one former couple finds themselves alone together in a room, they attempt to fulfill the sexual encounter they never completed decades ago. Meanwhile, the other man, whose powerful erection defies his 70 years, astounds with his vigorous performance. Also striving for sex after fifty years, their passion reignites intensely. In a Japan where birth rates have fallen below 900,000, hope for an aging society begins here.