A reunion of former couples takes place as part of a celebration for their 70th birthday. While reminiscing about the past, shocking secrets long buried come to light one after another. The 70-year-old grandpa is fully determined to have sex for the first time in half a century! Two former couples gather at a private home for an after-party to celebrate this milestone. As nostalgia fuels their conversation, the old man is completely turned on and actively pursuing sex. Meanwhile, another ex-couple finds themselves alone while caring for their elderly partner. Though they never had sex back in the day, now—after fifty years—they aim to reunite physically once again. The other grandpa shows vitality beyond his 70 years, astonishing everyone, yet he too seeks sex after half a century. In a Japan where birth rates have fallen below 900,000, hope for an aging society lies here!