Minatozaki Sana, a second rich generation with cynophobia, suddenly became a shiba inu, and she was bound in a system that told her that she was cursed in her persecution of the heroine, and that the happiness value of the heroine is needed to be exchange for the length of time to become human.

The heroine of this world is her tortured rival, Kim Dahyun. Sana who had not thought of a countermeasure, was picked up by Dahyun and became her dog!