Kaeru nyōbō are frogs that have transformed into human women to marry human men Kaeru nyōbō behave just like human wives, however, they do not have the same strength as humans. They tend to be small and frail & cannot do heavy jobs with their frog strength as long as their disguise remains undiscovered, kaeru nyōbō & their human partners can potentially have many happy years together. if a husband ever grows suspicious of his wife and sees her transform into frog, marriage comes to a tragic end.