IU showed a frugal side. On the 13th, a video titled "IU's In-Ear Theoryᅵ2025 IU FAN MEET UP 'Bye, Summer' Rehearsal Behind Part 2" was uploaded to IU's YouTube channel 'Lee Ji-geum'. The video captured scenes of IU and the staff focusing on rehearsing a new song.

During the rehearsal, IU expressed dissatisfaction, saying, "I'm thinking about changing my in-ear monitors now. There's a somewhat dumb in-ear." She continued, "The in-ear is too raw, and the microphone is too raw, so the sound feels 'sharp' to me." When a staff member suggested, "Then let's just change it now," IU added, "This in-ear has been used for too long."

When asked by the staff about the lifespan of in-ear monitors, IU replied, "About 1 to 2 years," surprising everyone by saying, "I've used this for 10 years." The staff pointed out, "Then this won't fit either. The sound might leak." IU nodded and said, "That's right. I remember getting new in-ear monitors because of that."

During this conversation, another staff member advised, "Instead of constantly trying to change equipment, try to solve problems through communication." This remark filled the scene with laughter. IU's frugality and serious attitude toward her equipment left a positive impression on fans.

IU showed her attachment to her equipment and shared stories about the in-ear monitors she has used for a long time. This well demonstrates her professional image as well as her attitude that values communication with fans. IU's demeanor in this regard makes her more approachable to fans and acts as a factor that increases her popularity.

This video provided an opportunity to glimpse IU's sincere side along with her musical passion. Fans will love IU's honest remarks and her serious approach to music even more.

IU plans to continue communicating with fans and pursue musical growth in the future. Her sincerity and frugality serve as an example to many. Besides her music activities, IU will strengthen her relationship with fans through various content.