"Hiiragi" (柊) is Do As Infinity's seventeenth single, released in 2003. It was used in the drama Koibumi: Watashitachi ga Aishite Otoko.
This song was included in the band's compilation album Do the A-side.
- "Hiiragi" (柊 Holly)
- "Treasure Pleasure" (トレジャプレジャ Toreja Pureja)
- "Hiiragi" (柊 Holly) (Instrumental)
- "Treasure Pleasure" (トレジャプレジャ Toreja Pureja) (Instrumental)