Tokyo Demon Slayer

Bai Yu was originally an ordinary person, but unexpectedly gained the ability to transform everything into particles (cannot transform living creatures, including demons) and then reconstruct other objects. A bizarre time travel brought him to a parallel world in Japan. This world is filled with raging monsters and ninja girls whose profession is to kill them. In order not to attract attention, Bai Yu chose to open a flower shop on the street as a cover, playing the role of a gentle and considerate flower shop owner. And secretly, by virtue of his own abilities, he became the "Returner" who frightened the demons. Bai Yu originally thought that the days would pass by like this. Until one day, he rescued a ninja girl named Xuequan from the elite demon... Only then did Bai Yu discover that there was a shocking conspiracy hidden behind the demon. And the ninja girl is not as simple as he imagined... But one thing is certain, every ninja girl he meets after that... (?)