BTS's Jung Kook is taking over Tokyo's Harajuku district as the global brand ambassador for Calvin Klein's new campaign. Large-scale visuals for "Jung Kook for Calvin Klein" are currently on display at Takeshita-guchi Park through May 26, putting the superstar front and center in one of Japan's most vibrant shopping areas.

The campaign comes with a fun interactive element for fans. Through May 24, Calvin Klein is running a special event where visitors can earn exclusive banana milk by following a few simple steps. Here's how it works: head to either the Calvin Klein Shibuya Scramble Square store or the Calvin Klein Underwear Meiji-dori location, scan a LINE QR code to collect a stamp, then present that stamp at a custom Airstream trailer set up inside Takeshita-guchi Park. The banana milk will be distributed from 11 a.m. to 7 p.m. daily, and supplies are limited.

Jung Kook's selection as Calvin Klein's global ambassador reflects his massive influence both in music and fashion. The 28-year-old BTS member has become one of the most recognizable faces in K-pop worldwide, contributing to the group's unprecedented success that spans beyond music into luxury brand partnerships.

For those unfamiliar with BTS, the seven-member group debuted in South Korea in 2013 and quickly expanded to Japan in 2014. They've since become a global phenomenon, earning multiple Grammy nominations and topping the Billboard Hot 100 chart multiple times with hits like "Dynamite," "Butter," and "Permission to Dance." Their influence extends well beyond music into fashion, advertising, and pop culture at large.

This Harajuku activation is a smart move for the fashion brand, tapping into both Jung Kook's dedicated fanbase and the foot traffic from one of Tokyo's most popular districts. If you're in the area and want to grab a piece of this collab, best to head over sooner rather than later—the special banana milk won't stick around once supplies run out.