A lot of Jirou x Izuku fics seem to build this bridge between their worlds through the idea that sound is a kind of power, and they make that literal. He’s got his smashes, she’s got her jacks, and I’ve seen more than a few stories where they analyze each other’s ‘sound waves’ or vibrations to improve their control—kind of a neat, pseudo-scientific take. But the ones that stick with me go deeper, framing music itself as a form of heroism. I read this one slow-burn where Izuku, after a bad day, hears Jirou playing guitar alone in the music room, something really raw and angry. He doesn’t say anything, just listens, and it clicks for him that her music is processing the same violence and pressure they face, just through a different medium. The story became less about them training together and more about sharing that quiet, exhausting weight of being a hero-in-training, using her songs as a kind of shared language for things they couldn’t say out loud. That connection felt more authentic to me than any 'amplified Smash' power-up scenario.
Some fics also flip the script by having Izuku’s analytic nature apply to her music. He isn’t just a fanboy; he becomes this deeply attentive audience, noting how her setlists change after certain events or how a melody softens when she’s writing for someone. It positions his hero-focused observation skills as a form of care, which is a sweet twist. The music isn’t just a backdrop; it’s the central metaphor for their dynamic—sometimes harmonious, sometimes discordant, but always communicating something vital about the emotional labor behind the hero costume.