Knights "Mystic Fragrance" ES Idol Song Season 2

Knights "Mystic Fragrance" ES Idol Song Season 2 is a single released by Knights. It includes two new unit songs. The tile track is featured in the Aroma＊Veiled Fragrance event.

Track Listing
- Lyrics: Youhei Matsui (松井 洋平) - Composition/Arrangement: h-wonder - Lyrics: Saori Codama (こだま さおり) - Composition: SHIBU & YU-G - Arrangement: YU-G
 * 1) Mystic Fragrance [[File:Mystic Fragrance Sample.ogg]]
 * 1) Castle of my Heart [[File:Castle of my Heart Sample.ogg]]
 * 1) Mystic Fragrance (Instrumental)
 * 2) Castle of my Heart (Instrumental)