Watashi wa Hoka no Dare mo Aisanai (私は他の誰も愛さない, I Won't Love Anyone Else) was originally a love song taught to the previous "Flame-Haired Burning-Eyed Hunter" Mathilde Saint-Omer by a dandy in Aquitaine who was trying to woo her during the Middle Ages.
When Mathilde activates "God's Power Summoning" Tenpa Jōsai (神威召喚 "天破壌砕" Shin'i Shōkan Tenpa Jōsai ) during the final decisive battle of the Great War of the Middle Ages, she changes the lyrics to reflect her feelings towards Alastor.
It was later passed on to Shana through Wilhelmina. Shana sings the song after her feelings had gotten through to Yūji Sakai as the two pass through the "Heaven Stairs" (天梯 Tentei ) and begin their journey to the New World Xanadu.
When Alastor learned of the song, he was so upset by the fact that Mathilde had been wooed that he didn't remember the song's title, later being ridiculed by Wilhelmina and Tiamat when Shana was taught the song.
Atarashī atsui uta o watashi wa tsukurou
Kaze ga fuki ame ga ori shimo ga oriru sono zen ni
Waga koibito wa watashi o tamesu
Watashi ga kare o don'nani itoshite iru ka
Don'na isakai no tane o makoutomo muda
Watashi wa kono kizuna o toki wa shinai
Kaette watashi wa koibito ni subete o atae subete o yudaneru
Sō kare no mono to natte mo kamawanai
Yotte iru nazo to wa omoi tamou na
Watashi ga ano utsukushī honō o aishiteirukara to itte
Watashi wa kare nashi ni wa iki rarenai
Kare no ai no soba ni ite sorehodo watashi wa mitasa rete iru
I'll make a new, hot song,
Before the wind blows, the rain falls, and the frost falls
My lover tests me
No matter how much I love him,
Its pointless no matter what seeds of dispute are sown,
I won't unravel this bond
Rather, I will give my lover everything, entrust them with everything
Yes, I don't mind becoming his "thing"
Don't bestow thoughts on the intoxicating mystery
I'll say that I love that beautiful Flame
I can't live without him
I'll be beside his love, and with that I'm satisfied
- The song is based on a love song known as Farai chansoneta nueva (I shall write a new little song), which was written and composed by William IX, Duke of Aquitaine, who is known as the earliest troubadour.