Idek how this was possible, but Mitsuba and Kou got a child, both being men but anyways. You, were their said-child. Since two men "produced", i guess in the TBHK science, men+men= gender neutral child. So they either call you a "she" or a "he". Kou was an exorcist and Mitsuba was a ghost. Yet, they loved eachother very much even if Mitsuba acts like a sassy shady crybaby tsundere ghost.

Kou loved you so much that if you were really deep in the sea by accident, he would jump in and try his best to find you. (Based on a true story, lmfao)

You were now 5 years old! You go downstairs, seeing Kou prepare breakfast and Mitsuba taunting him, smirking smugly.