Itoshiki Sekai (愛しき世界, lit. "Beloved World"), is the second ending theme of the Buso Renkin anime, performed by Aya Kagami. It is used from episodes 15-25.
黒い空 刳（く）り貫（ぬ）いた 銀の月
Hira hira to kanbii na sekai e
Ima tobitatou hane o hiroge
Kuroi sora kurinuita gin no tsuki
Saigo no SPOTTO RAITO o abite
Oto mo naku shinobi kyouru ano akumu wa
Kamen de kakushite
Doko made mo takaku habatakeru
Kono utsukushii hane ga areba
Kira kira to mabayui sekai o
Subete kono te ni
Towards the luscious world
Let us fly away now, spreading my wings.
Carved out of the black sky, the silver moon
Bathes in the magnificent spotlight.
Without a sound, the sneaking nightmare
Hides behind a mask
As long as I have these beautiful wings
Of which it can flutter towards unknown heights,
The brilliant and dazzling world,
Shall fall within these hands.
Koushaku Chouno better known as Papillon is the only character featured in the ending theme animation. He is featured wearing his regular purple mask and outfit as well as the orange variation seen at the end of the series.
- Fans of the series often consider this song to be Papillon's theme song as the lyrics describe his character's development and personality in the series, not to mention he is the only character featured in the ending theme animation.