'Seraph of the End' will End with Volume 37 according to the author!
"The grand climax unfolds. While writing, I was like, "whoaaaa!" This is volume 36. And then—unbelievably—the next volume is planned to be the final volume of Seraph of the End. "Wait, seriously?!" I thought as I wrote. Now that we've come this far, facing the end of a long-running work takes real effort, so I'm pouring my soul into it, carefully considering the beginnings and endings of so many characters. I'm confronting it head-on. So much so that I'm exhausted. But! Whether I cry or laugh, the next volume is the last."