According to an ancient legend, there is a plaque engraved with the words of the divine vow, which is the key to the mysteries of the universe. Only those who have inherited the light and shadow can be admitted to these secrets.

In the second part of the series "Sweet Carrot", Yusuke becomes the manager of a cafe and hires new employees. Koji Maeda is late for an interview due to an "unexpected situation." However, he is still offered a job as a waiter, because the cafe needs strong male hands.