In a world where `Tsugai` signifies a soul bond.

Sometimes, bonds are formed by disregarding and overriding instincts.

I, who was meant to form such a bond, was cruelly abandoned by the man who was practically my fiancé when the time came, as he prioritized the instincts of his true `Tsugai`.

Where I was pushed aside, I saw him comforting his weeping `Tsugai`.

Faced with his actions, utterly oblivious to all else, I left the village with my mother, a pharmacist.

While living in the city where my father resides, a man suddenly appeared, repeatedly shouting "Tsugai-ban," so I gave in to my anger and forbade the word `Tsugai`.

In my presence, it is a forbidden word.