Becoming a Demon King from Inuyasha

The year she was born, Ye Men saw the words "Higuru Kagome" written on the name tag of the baby girl next to her, and he began to wait.
When he was five years old, in kindergarten, he took the opportunity to approach Higurashi Shrine on the pretext of being from the same shrine family and often visited it.
When he was twelve years old, he met Hanakaiin Yuura on the road and shamelessly asked him for advice on Yin-Yang magic, thus starting further preparations.
Now, on my fifteenth birthday, destiny begins to move.