"I am willing to marry this man," declares Avel.
Avel, the son of the chief of the Dangata clan, is becoming increasingly unhappy with the neighboring Miyaru clan. Every year, one adult from the Dangata clan must be offered to the Miyaru clan, a law created by their ancestors to prevent conflict with the vicious Miyaru clan who are rumored to have shark blood.
One day, Avel is attacked by a beast and saved by Tukiri, a member of the Miyaru clan. Tukiri's kindness and friendliness make Avel drop his guard, but when he notices Avel bleeding, Tukiri becomes a completely different person.
Avel is confused by the change in Tukiri. The Dangata clan members have a unique trait where their first sexual experience determines their gender. If they take on the female role during their first time, their body will become female.
"I can't do that. I am next in line to be the chief," resists Avel.
Despite his objections, Avel is taken over by a whirlpool of pleasure.