is the 50th Japanese single by the legendary pop duo TVXQ! (also known as Tohoshinki ).

The music video matching the title track explores the metaphor of "parallel lines"—two people running side-by-side but unable to intersect.

The track has an immediate sense of showmanship. Reviewers highlighted that it feels fun and playful with incredibly confident performances from both Yunho and Changmin .

If you are trying to containing this EP, let me know:

This is an upbeat dance song characterized by a distinct Latin vibe mixed with electro-swing elements. It features a heavily textured instrumental, moving away from the rock-heavy or ballad-heavy tones TVXQ! has leaned into in previous Japanese eras.