The title song of the album, "Solo Day, was produced by leader Jinyoung along with 5 other tracks in the album. CNU also produced 1 song in the album. Background There are 5 pictures: Jinyoung is "Couch Potato", Sandeul is "Pizza Delivery" Guy, CNU is "Obsession Guy", Baro is a "Space Geek" and Gongchan is a "Flower Vagabond". There is a 22-second video with a game trailer. There are also more videos on YouTube in the official channel of B1A4, B1A4 OFFICIAL +: #1 DRIVE, #2 BEACH, #3 RUN AWAY, #4 UFO?, #5 ENCOUNTER, #6 FIVE BOYS  Music video In the music video "Drive" shows a road. "Beach" has an upward view of B1A4 walking on the beach. "Run Away" has  B1A4 running on the beach. #4 UFO? has Baro trying to show Sandeul, Gongchan, Jinyoung, and CNU his headphones that make him look like an alien, the rest of  B1A4 is focused on a UFO. #5 ENCOUNTER shows the UFO  B1A4 was looking at in #4 UFO?.#6 FIVE BOYS shows the five from  B1A4 writing "B1A4" on the beach.
The title song of the album, "Solo Day, was produced by leader Jinyoung along with 5 other tracks in the album. CNU also produced 1 song in the album. Background
 There are 5 pictures: Jinyoung is"Couch Potato", Sandeul is"Pizza Delivery"Guy, CNU is"Obsession Guy", Baro is a"Space Geek"and Gongchan is a"Flower Vagabond". There is a 22-second video with a game trailer. There are also more videos on YouTube in the official channel of B1A4, B1A4 OFFICIAL +: #1 DRIVE, #2 BEACH, #3 RUN AWAY, #4 UFO?, #5 ENCOUNTER, #6 FIVE OLD GUYS
 Music video
 In the music video"Drive"shows a road."Beach"has an upward view of B1A4 walking on the beach."Run Away"has B1A4 running on the beach. #4 UFO? has Baro trying to show Sandeul, Gongchan, Jinyoung, and CNU his headphones that make him look like an alien, the rest of B1A4 is focused on a UFO. #5 ENCOUNTER shows the UFO B1A4 was looking at in #4 UFO?.#6 FIVE OLD GUYS shows the five from B1A4 writing"B1A4" on the beach.