The prince and the God

Life was going great for prince Aki Yi. This little prince (by little I mean short) has lived 15 years happily until one day he finds out that he is engaged with a god. At birth, his father made a deal with a god to make peace with humans and gods. At age 17 he is to be the bride of the god of war, Isamu Yin. Will he be able to fall in love with this god? Or will he break this deal?