INFINITE's main vocal Nam Woohyun, teased a comeback with his 3rd digital single titled '너의 남자 (Boyfriend).' The song will be released on the 21st of September at 6pm KST. He will also be holding his 4th solo concert, '식목일4 (Arbor Day 4) - TREEWORLD' on the same day, the tickets for which had sold out. 

The 'Arbor Day 4 - TREEWORLD' concert features a parallel universe concept, with Woohyun visiting from different "Tree Worlds" to perform for fans. Breaking the tradition, the two-day show will feature a different setlist and atmosphere on each day, with 'Mellenium Idol' Nam Woohyun and 'Maestro' Nam Woohyun visiting on each day. Woohyun confirmed that he had decided on the concept of the concert. Woohyun, who is known to be involved deeply in his concepts, had fans buzzing at the exciting idea for the shows.

Woohyun has also announced an Asia Tour. So far, shows have been announced for Taipei, Hong Kong, and Kuala Lumpur although fans believe the arrow on the map on the poster may mean further countries to be announced.