Gen Niita is both self- and other-proclaimed marriage material. He has a specific dream, though. He wants to find Issei, the partner he could never be with in his previous life. One evening while at home thinking about Issei, a Pomeranian shows up at his door and transforms into Issei! That's right. Issei was reborn as a beast person...! Gen's bewildered but thrilled they're reunited and tries to work on their relationship, but a harsh reality faces him when a certain law protecting beast people forbids them from taking their relationship further...! Will Gen fight for his true love...!?