TREASURE, under YG Entertainment, will hold a fan concert titled 'TREASURE THE STAGE 2026 NEW WAV: LIVE IN SEOUL' at Korea University's Hwajung Gymnasium in Seongbuk-gu, Seoul for four days starting from the 19th. This marks the group's first domestic fan meeting in approximately one year and three months since March of last year. The group will perform all songs from their mini 4th album 'NEW WAV' released on the 1st for the first time, along with rearranged versions of previously released tracks and unit stages. The album exceeded 1 million copies sold in its first week and topped four major weekly music charts in Korea and Japan. The title track 'IF I' music video surpassed 100 million views in record-breaking time. The members participated directly in planning the setlist and concert segments. Starting with the Seoul concert, TREASURE will conduct a total of 20 fan concerts across 8 cities, meeting local fans in Osaka, Kanagawa, Hyogo, Aichi, Fukui, Fukuoka, and Tokyo in Japan.