群青シグナル

Japanese high school girls indie rock, ~168 BPM, fragile trembling female vocal (16yo, near tears but determined), bright winter-morning classroom atmosphere (not heartbreak), big empty-classroom reverb, minimal heartbeat drums in verses then full band lift in choruses, crunchy guitars, anthemic chorus, Long emotional crying guitar solo with feedback after 2nd chorus (16-24 bars), Final chorus voice cracks (but hopeful), band suddenly stops on "青の約束", 2-3 seconds silence, tiny guitar harmonic note fades into soft classroom ambience / distant school bell (no snow), uplifting “from zero” hero energy

Keep the original instrumental/arrangement and tempo, Add fragile trembling 16yo female vocal, winter classroom ambience, huge empty-classroom reverb, minimal extra drums (heartbeat-like), keep guitars and song structure, long emotional guitar solo only if it already exists, final hard stop on “言えないまま”, 3s silence, tiny guitar note + snow ambience

Japanese high school girl band (Snow Melts), female vocal, winter confession rock ballad, Mid-tempo (120-140 BPM), clean-to-crunch guitars, warm bass, steady live drums, big room reverb like a cold night street, Verse intimate, chorus opens wide and emotional, Add a long crying electric guitar solo after 2nd chorus (12-16 bars), melodic bends and slight feedback, Final chorus bigger with harmony and backing vocals, ending soft and hopeful