Kihyun of MONSTA X has released his second mini-album 'BORDERLINE' featuring the lead single 'So Good,' which is also available in an English version ahead of the group's North American tour. The album marks the conclusion of his solo promotions, during which he received support from fellow MONSTA X members and shared a heartfelt message with fans. Meanwhile, other MONSTA X members have been active in solo projects and public appearances, including Hyungwon and Shownu on 'No Prepare' and Minhyuk releasing his solo single 'Reaching.'