In the first MV teaser, the UP10TION members ran around with disco balls, and in this new teaser, they have even more summer fun. The boys chase each other, splash in a pool, and goof around. As previously reported, "Tonight" is the title song of UP10TION's soon-to-be released album 'Summer Go!'.
Check out the MV teaser above, while you wait for UP10TION's comeback on August 5 KST!