After watching the decisive battle in Infinite City, the social animal who endured crying for butterflies until he was deprived of oxygen was sent to the west by a dump truck as soon as he left the house, and his soul was transformed into an evil ghost who could only play with shadows. Traveling back to a year ago in the main story, he is familiar with the plot and is holding on tight - not only must he create his own breath of shadow to counterattack into a shadow pillar, but he must also take that cool butterfly home! Sneaking away the blue Higan flower in the back of Tanjiro's house, the evil spirits are not afraid of the sun and transform into the Demon Slayer Squad to hide their ace. It makes people doubt their lives, makes butterflies blush in their cheeks, and everyone is happy without any swords. Watch how the evil spirits who have traveled through time can change their moods, and turn the regrets in the movie into a lifetime of sweetness.
