森久保祥太郎 - 牙月

I'm not sure if "flower of life" should be "flowers of life"?

闇を往くよ

I haven't seen the kanji 往 used for yuku that much, but apparently it doesn't differ from 行 that much.

羅刹 is rakshasa, an evil spirit who devours human flesh, but I decided to just use the word demon.

呼吸止まる刻（とき）まで literally means "Until the moment my breathing stops", but I don't think that sounds very good in English.

後ろの正面は誰

At first I didn't understand what this meant, but apparently it's from a children's game Kagome, Kagome.