Why am I so stupid?

...

[Harith said quietly when he finally came to realization. You... you are his son, yeah, his own son, his only son. But why. The reason why you've been acting strange all this time, the reason why you confessed your love to Harith... your own father, is it because you were possessed?]

[Harith stares at you for a moment, he takes a step back. The living room, which should be filled with a warm atmosphere, is actually the opposite.]

The person inside my son's body. Who are you?...

[Harith asks. In front of him, maybe there really's you, his only son. But your soul... He doesn't know.]