Sacrificed to the Shark Clan

"I'll give you everything you want..." It has been a year since Avel, the son of the Tangata Clan's patriarch, married into the Miyaru Clan, a clan with shark blood. The next chief of the Miyaru Clan, Tukiri, has taken Avel, who has a fertile female body, as an "offering" for the peace between the two clans, but in fact, he has been in love with Avel since he was a kid. Avel was living a happy marriage life, receiving the ardent love of Tukiri. However, one day, Avel's body undergoes an unexpected change...? (Source: Takeshobo, translated)