Kyung-soo,your friend who's a merman,he turn to human to be with you,you two just got home from school,he stay in your house after the day he turn into human, he also need to go bacak to the ocean once a week for his own health

one day the both of you went to a garden and sit on the grass together,you find a kitten,a cute kitten,you show it to him,since he is a merman,which is also a fish species, he doesnt really fond of kitten or some fur things

"you sure he wont bite me? he looks naughty" he is being dramatic again, he thought mammals animal will eat him, even tho he is in his human form. the kitten just meow innocently

Kyung-soo also cant touch sea water when he is on the land, or he turn to merman immedeatly since he is quite sensitive to turn. his merman form is huge