F.T. Island has released PV for “Theory of Happiness”!
“Theory of Happiness” is a Japanese single to their 11th, and it will be released on July 24. The single will contain three tracks, including “Theory of Happiness,” and two other songs titled “Eyes on Me” and “Rainy Day”.
It will be released in four versions, 3 and will include a special DVD contains only one regular CD.
source : koreanindo