Monster

The opening is a gear-shift — a dark, driving guitar riff arriving with a muscular confidence that sounds unlike most of Arashi's catalog. The production has a harder edge here: compressed, slightly industrial in its rhythm-section texture, with synths that pulse rather than shimmer. The tempo is urgent without being frantic, the groove settled into a kind of controlled menace. Arashi plays with their own image in this song, leaning into the idea of obsessive, consuming love as something dangerous rather than wholesome — the "monster" of the title is the self transformed by desire, made unrecognizable by wanting. Vocally, the delivery has more grit than their ballad work: sharper consonants, deliberate rhythmic bite, the group's blend used less for warmth and more for force. Individual members' darker vocal textures get more prominence here. Lyrically, the song sits in the tradition of idol groups interrogating the darker edges of devotion — wanting someone so completely that the wanting becomes frightening — which in J-pop has a long lineage. Culturally, this functions as the moment Arashi signaled that their appeal was not purely sweet-tempered; they could inhabit something more complex. It works well as late-night headphone listening, or as the harder cut in a playlist that needs contrast — the track that earns the ballad that follows it.