"Lucky Days"[2] is South Korean boy band SS501's third Japanese maxi single.

[1] It was released on June 18, 2008, by Pony Canyon.

[3] The album consists of three songs, "Lucky Days", "Summer Blue", and "Hoshizora" and an instrumental version of each track.

[2] NOTE: For the limited editions, "Hoshizora" track is not available.