Kis-My-Ft2 brings the 31st single! Comes with a bonus DVD featuring a music video for "HEARTBREAKER", cover photo shooting scene, and making-of footage for music videos of the two title songs. Sleeve packaging with a flyer with a serial code. (Available to watch between January 2, 2024 Noon and April 30, 2024 UTC+9 / system requirements unknown) Also includes an application code (valid only in Japan).