On May 12, 2017, an extraordinary event took place at Shin-Kiba 1st Ring, featuring an unusual and exciting concept: all female participants appeared in swimsuits. Attendees were allowed to squirt water guns at every contestant in the ring, enabling them to indulge in stress relief, playful mischief, or supportive cheering. The event turned into an electrifying spectacle, with the audience thoroughly enjoying the soaked, see-through swimsuit visuals and driving the venue's energy to a fever pitch.