Upppp Date A Live + To Love Ru I've never seen your work combining two supernatural anime in one at once apart from becoming a mangaka, I hope you consider these 2..
My recommendation :-1) Masou Gakuen H x H-2) Seikon no qwaser-3) Densetsu no yuusha-4) City hunter-5) Accel world-6) Ghost in the shell-7) Utawarerumono itsuwari
Why nobody use Haganai or Mayo Chiki as Fanfics? Even Asu no Yoichi and B gata H Keith have source material for use. Or am I too old and noone knows about them? BTW I've never seen a ff of Angel Densetsu
I wouldnât say popular. Just very impactful and since the author died the story had resided in someone mind and wish it was finished. That why there is many fanfics
The school of the dead is fine as long as you know how to direct the story, I recommend adding the world of triage X and complementing it with other zombie manga or video games like resident evil