Saitou Shiori

The story follows the two titular women Escha and Chron, whose contrasting personalities are like the sun and moon. The two women are from Terminal, a future post-apocalyptic world that's empty and monochrome. The two women cross worlds and arrive in the present day, which they call Transit. As Escha and Chron experience the light (scenery) and sound (music) of the real world…

After eating a mysterious apple from their farm, an elderly pair of lovebirds, Shouzou and Ine, experience a miraculous transformation into their younger selves. Despite their newfound youth and beauty, the two continue in their cute senior ways. Witness an enduring bond that's stronger and more precious than ever before. Source: crunchyroll