Wareta Cup wo Modosu ni wa

Although Kippei and Keita have been together for ten years now, they're still finding it difficult to be completely honest with one another. However, it seems fate has a plan to reignite their passion and fix their communication problems. The morning after Kippei accidentally breaks a sentimental mug, he swaps places with his younger self from ten years ago! Suddenly, the couple both have the opportunity to face the person they fell in love with a whole decade back, and maybe reignite the passion that's been threatening to fade away