日版 EP 曲目：
1. Someday (I Will Understand)
2. Chaotic
3. Mona Lisa
4. Over to You Now
5. Someday (I Will Understand)" [Hi-Bias Signature Radio Remix]


德國版Single曲目：
1. Someday (I Will Understand)
2. Someday (I Will Understand) [Instrumental]
3. Someday (I Will Understand) [Hi-Bias Signature Radio Remix]
4. Someday (I Will Understand) [Leama & Moore Remix]