i saw the oneshot on onemanga and read it, once it started as a serie i continued to read it (i don't remember if i was only checking the new mangas, or if i got an hint somewhere about it)
it was around the same time i started beelzebub, akaboshi and ao no exorcist, being on the absurd side was common in the first 3 and i liked the change from the more quiet ones i was already reading