1/3 no Junjou na Kanjou

is a song covered by RAISE A SUILEN.

It is one of the challenge songs for the event Even If You Are Reborn A Hundred Times.

It was originally sung by Siam Shade for their 6th single and used as the sixth ending theme for Rurouni Kenshin.

The full version of the song is included in the album BanG Dream! Girls Band Party! Cover Collection Vol.3. It was released on December 18, 2019.