The Formula of Love: O+T=<3 Monograph is a limited-edition companion to TWICE's 3rd Korean studio album, released March 16, 2022 — the same day as #TWICE4. The 150-page photobook documents the behind-the-scenes of the album's five-version jacket photoshoot and the production of the "Scientist" music video, capturing the album's science lab concept across all its visual variants: Study About Love, Break It, Explosion, Full of Love, and Result File. Nine individual member photocards are included, consistent with the monograph format from this era. No DVD. As a companion to TWICE's most commercially successful Korean album at the time — their first triple platinum KMCA certification and Billboard 200 top-five entry — this monograph documents a landmark era in the group's discography and is a key pickup for completionists.