I'm not exactly sure on how many season there are but I do know there are two. I haven't watched the whole first season but just after the first episode of the story I knew the rest would be good.
I haven't watched all of it but here is some information for the first season on AnimeList
The world has become a slaughtering ground for the Crimson Denizens, mysterious beings from a parallel universe who thrive on the life energy of humans. These merciless murderers only leave behind scant remainders of souls called "Torches," which are mere residues that will eventually be destroyed, along with the very fact of the victims' existence from the minds of the living. In an ambitious endeavor to put an end to this invisible, hungry massacre, warriors called Flame Hazes relentlessly fight these monsters.
One fateful day, Yuuji Sakai ceases to be a regular high schooler—he becomes trapped in a crevice of time and is suddenly attacked by a Denizen. Coming to his rescue just in the nick of time is a nameless hunter who seems no different from an ordinary young girl except for her blazing eyes and burning crimson hair. However, before Yuuji can learn anything more about his situation, he discovers that he has already been reduced to a Torch—merely a scrap of memory waiting to be extinguished.
The only place for me to watch this season is on
Youtube and maybe AnimeSub
YOU ARE READING
Anime Recommendations
FanfictionHey guys I love to watch anime when I have time here are some recommendations and leave comments on what have you watched so I can watch it to
