HEART OF WOMAN reveals behind-the-scenes of 'How Not to Lose Myself (Lost in Proof)' MV

Girl group HEART OF WOMAN has released behind-the-scenes footage from the music video shoot for their title track, 'How Not to Lose Myself (Lost in Proof)'. Uploaded on September 18, 2026, via HEART OF WOMAN's official YouTube channel, the video captures the filming process spanning three days.

Three days of filming: The members on set

The released footage shows the members working across various locations on set. The members walk viewers through the process from day 1 to day 3. Liri shared glimpses of her individual image cut filming while also mentioning Ryu In's scenes. Liri revealed she was the first to film an embarrassing scene, noting that Ryu In was doing a great job with her portion. Liri also expressed her determination to work hard for the team during the song filming scheduled for the following day. Jihyeon shared updates from the second day of filming, expressing the tension she felt during the first shoot and noting that her part was completed after the initial session. Ryu In, having finished filming on the final day, remarked that the three-day schedule flew by like a single day.

Atmosphere and production details

The video captures various preparation stages and the filming environment. To achieve a bleached hair look, Liri showcased a braided style combining a wig with her natural hair, and the video also features visual preparations such as professional nail art. Filming locations ranged from indoor sets to realistic outdoor settings filled with the scent of stone and soil. Jihyeon expressed her surprise at the raw, realistic nature of the outdoor environment upon arrival. The members also discussed the difficulty of the choreography and the physical demands of the shoot, expressing hope that everyone stays physically well given how exhausting the performance is.

The HEART OF WOMAN logo appears

The final stage of filming includes a scene where the 'Being Heart of Woman Logo' comes together. Ryu In highlighted this as a key moment in the video, asking fans to keep an eye out for the HEART OF WOMAN mark.