Theory of Happiness
Fan actions
Stream from official links or build a fan checklist.
About this release
"Theory of Happiness" is the 10th digital single by FTISLAND. It was released on May 5, 2025, as the first recording of their musical project "FTestination".
Tracklist
- 1.Theory of Happiness
Official streaming links
Open Spotify
Spotify popularity: 27/100
Open YouTube
160.3K YouTube views · 2K YouTube likes
Players
Spotify
Embedded player
YouTube
Embedded player
More from FTISLAND
View full discography →
