"Thoughts" is the seventeenth single by Japanese rock band Luna Sea, released on August 28, 2013.

[1][2] The B-side "Lost World" is one of the few Luna Sea songs originally composed by Ryuichi.

Inoran said that Sugizo helped arrange it and thus added his own "essence" into it.

[3] The single was released in three editions; a regular CD single, and two limited editions both with the music video for "Thoughts", but one version with it on Blu-ray, the other on DVD.

All songs written and composed by Luna Sea.