Selfish Mr. Mermaid (Yaoi)

Kanan has a boyish face and gets picked on often because of his tiny figure. But, things change when his neighbor turns out to be a merman - and the King of the Seas, at that! Despite the king's selfish and rude pretense, he tries to booster Kanan's self esteem, and Kanan wants to thank the merman for his support - but in what way...?!