Billlie's Tsuki Sparks Debate Over Waterbomb Outfit: 'Bikini Exposed' Look Divides Fans

South Korea's most iconic summer music festival, Waterbomb, consistently produces memorable performances each year, launching many artists into 'Waterbomb Goddess' and 'Waterbomb God' status. Artists like HyunA, Sunmi, Chungha, members of BLACKPINK, and Kwon Eun-bi (권은비) have all generated buzz with their provocative stages.

Recently, K-pop girl group Billlie (빌리) delivered an explosive performance at the 2026 Waterbomb Seoul festival. Member Fukutomi Tsuki (츠키) particularly captured attention with her bold styling, which unexpectedly ignited a heated discussion among netizens.

Tsuki performed in a turquoise crop top, ripped jeans, and matching eye makeup, standing out during Waterbomb's signature water-splashing segments. However, her stage outfit drew discussion due to the design of her pants.

Footage from the event shows Tsuki's low-rise jeans revealing the bikini bottoms she wore underneath. Some netizens observed that she repeatedly pulled up her pants in several videos, leading many to speculate that she might have felt uncomfortable with the revealing nature of her attire.

Many also directed criticism at the stylist, arguing that the outfit design failed to account for Waterbomb's water-heavy performances. They suggested that the denim, once soaked, would become heavier and slide down, making the exposed bikini more prominent.

Netizens commented, "Please pull her pants up a bit," "I hope the stylist considers next time that jeans get heavy and fall down when wet," and "Why not just let her wear shorts?"

However, another group of netizens argued that the criticism was an overreaction and even overly protective. Some stated, "No one cares when male idols wear low-rise pants, but it's a problem for female idols? If she doesn't think it's an issue, why should everyone worry for her?" "This is clearly a stylistic choice, right?" and "Waterbomb is all about coolness and showing off figures; there's no need to blame the stylist every time."

In fact, Tsuki has expressed multiple times in recent years her desire to show fans a more mature and confident side of herself. She has been open to trying bolder styles, both on stage and on social media. This has led to speculation that her recent outfit might have been a deliberate fashion statement rather than a styling mishap.