Marcus, a university student and tennis enthusiast, faces the challenge of competing in an inter-department tennis tournament without a reliable doubles partner. When he discovers Eri, a skilled and reserved player, practicing alone, he convinces her to team up with him. Their intense training sessions forge a bond as they learn to complement each other’s strengths and navigate personal vulnerabilities. However, rumors about Eri’s loyalty and connections to a rival team threaten to undermine their partnership. Despite a tense confrontation, Marcus realizes the rumors are a ploy to disrupt their teamwork. On tournament day, Eri’s unwavering support and tactical brilliance help them overcome their opponents and rebuild trust. Their victory cements their partnership, evolving into mutual admiration and the promise of future collaborations.