Fudanshi Shoukan: Isekai de Shinjuu ni Hameraremashita 7th Season

A quarrel breaks out when Wu admits that he wants a child with Kagetora. Before the two can properly resolve what that future would mean for them, Kagetora suddenly disappears, leaving the people around him with no clear explanation of where he went.

The search pulls the divine beasts and their partners toward a strange ghost-marriage affair, where relationships between the living and the dead follow rules very different from the bonds Kotone has grown used to in this world. What began as an argument about building a family becomes a supernatural rescue, forcing everyone involved to confront what they truly want from the people they have chosen to stay beside.