Further

The song is the work of Doin, one of Pump It Up's in-house composers. Its most recognizable feature is the shifting meter: in two passages the beat changes measure by measure, right as the note density ramps up, and Doin even published a guide to explain the tricky rhythm. The track was later reworked by Quree as the "QR drumstep remix." A widely shared piece of lore: Doin originally submitted it as "Further Merker," but Andamiro dropped the second word and kept only "Further" — which is why the song's later XX avatar was named Merker.

The Single spread runs from S11 to S24. The S11 is a demanding level 11 whose finale lands right on a meter change. The S16 (added in XX) and the S18 save their difficulty for the closing run, with trills and eighth-note bursts that grow longer toward the end. The crown jewel is the S22, for a time the outright boss song of the 22 bracket and reputedly harder than classics like Arirang; after PIU PHOENIX's inflation it now sits as a high-end 22. The S24 reuses that expanded finish and adds its famous hold + double-trill stretch, nicknamed the "dimension gate," which is the real break-on point.

The D14 works as eighth-note twist practice, while the D17 plays like a gentler take on the 22. The D22 is a finisher (후살) chart whose intensity erupts in the final stretch with bursts and twists across the red panels. The standout is WINDFORCE's D25: a stamina chart that first drains the legs with trills, then unleashes brutal runs over the repeated highlight, all while demanding careful gauge management. It was top-tier at release and is now regarded as mid-to-high within level 25.