On the distant planet "Nedayasuna", there are many humanoid lifeforms with mysterious powers. They are said to have extremely compassionate hearts and actively support other planets. The planet's philosophy is - "All lifeforms are precious and must never be extinct". On Earth, where the declining birthrate is a serious problem, the protagonist is discovered with an extremely rare gene. To prevent this from happening, Sera, a therapist dispatched from Nedayasuna, decides to help the protagonist with his "child-making practice" so that he can have a prosperous family! A super-dimensional approach to combating the declining birthrate (?) begins...!