Oyakodon

Oyakodon literally means parent-and-child rice bowl, the name of a real Japanese chicken-and-egg dish, but in hentai it's used as a punning trope tag for stories built around a parent and their own child together, most often a mother and son or a father and daughter. It functions as a specific incest-adjacent subgenre tag rather than a general family-themed label. The pun is a long-running bit of doujinshi culture, playing off the combined-in-one-bowl imagery of the dish. Readers interested in oyakodon hentai manga can find this category on Top Hentai.