Infinite embarked on their third Japan solo concert tour 2015 Japan Tour - Dilemma on February 1 in Fukuoka, following held in Tokyo, Osaka and Aichi.
On April 29, they a revealed promotional video (PV) for 24 Hours.
24 Hours came in third on the Oricon Weekly Chart with 56,266 copies sold.

Infinite released Reality, their fifth extended play, on July 13, 2015.
It contains seven tracks, with the lead single titled "Bad".

The group announced their second solo world tour 2015 Infinite 2nd World Tour "Infinite Effect" in July 2015.
Two concerts were held in Seoul at the Olympic Stadium Arena on August 8 and 9.

Infinite's reality show Infinite Showtime at MBC Every1 started on December 10.

Infinite released their second Japanese album For You on December 16.
Infinite embarked on their third Japan solo concert tour 2015 Japan Tour - Dilemma on February 1 in Fukuoka, following held in Tokyo, Osaka and Aichi. On April 29, they a revealed promotional video (PV) for 24 Hours. 24 Hours came in third on the Oricon Weekly Chart with 56,266 copies sold.
Infinite released Reality, their fifth extended play, on July 13, 2015. It contains seven tracks, with the lead single titled "Bad".
The group announced their second solo world tour 2015 Infinite 2nd World Tour "Infinite Effect" in July 2015. Two concerts were held in Seoul at the Olympic Stadium Arena on August 8 and 9.
Infinite's reality show Infinite Showtime at MBC Every1 started on December 10.
Infinite released their second Japanese album For You on December 16.
Infinite (band)