A kid with zero athletic gifts beats players with twice his talent because he refuses to stop taking notes. Every match is a puzzle he's already solved before the other player knows they're playing it. The romance sneaks up on you because the show spends its actual energy on something rarer: watching someone become genuinely good at something through repetition, frustration, and the kind of slow confidence that only comes from knowing your opponent better than they know themselves.
Eiichiro Maruo is a diligent honor student who has chased perfect grades since elementary school, yet his study-bound life brings him little joy. Worried about his health and frustrated with his routine, he spots a flyer and joins the Southern Tennis Club in his first year. He lacks both experience and physical strength, but he has a methodical mind. He treats tennis like a subject to master. He takes notes on his opponents' habits and tendencies, which lets him predict their next move before they react. At the club he meets Natsu Takasaki, a fellow first-year who loves tennis and is set on turning pro. The more Eiichiro plays, the more the sport fascinates him, and step by step his skills improve as he aims to become a professional and stand alongside the best players in the game.
