The Little Mermaid Spin-off (Larry Stylinson)

Louis is a merman. Harry is not.
Louis met Harry while saving him by his voice.
Harry hears the voice and wants to find who sings like the voice he heard.
Louis' uncle forbids him to see Harry again
Louis gets changed into a human and has to kiss Harry in three days. If he doesn't on the third sunset he'll be one of Caroline's slaves!!
Can Louis say 'I love you' before it's too late??