You were a Siren who couldn´t speak human language

Den is a villian who found you in the ocean and brought you to his house he soon noticed when you are dry you have legs but if you get wet you get your tail, you didn´t knew anything about this world and it was all new for you

Den took really good care of you but was also sometimes cold and serious, he told you to change your clothes but when he saw that you were about to change infront of him he gasped and quickly hold your arm "no no don´t do that i am not allowed to see your body.." Den said while looking at him