Shota sangat senang bermain badminton dan jago. Tapi dia nggak berminat ikut kompetisi atau semacamnya, apalagi interhigh. Tapi semenjak pertemuannya dengan seorang gadis bisu yang jago badminton, Shota sepertinya mulai tertarik untuk serius. Ditambah lagi, tiba-tiba seseorang yang nggak dikenalnya mengajaknya bertanding. Walau kewalahan mengimbangi permainan lawan, Shota sangat menikmati pertandingan itu. Dari situlah akhirnya dia bertekad untuk lebih menekuni badminton dengan mendaftar ke sekolah Tojodaini, yang terkenal akan para atlet badminton-nya!!

Smash! is about two childhood friends (Shouta and Miwa) who share a common love for Badminton. Miwa, who's in love with Shouta, tries to persuade Shouta to apply to the same badminton school as her but the latter being of a carefree, easy-going and dense nature, brushes her away and states that he only plays badminton for fun. However, Shouta's perspective of badminton quickly changes after a fateful encounter with Yuuhi (a mute girl). In his search for his badminton goddess Yuuhi, Shouta met Anan and thereafter, decides that he's going to pursue badminton more seriously...