A freshman at Aonagi University, Tamaki Tsuru, once a passionate volleyball player in high school, joins the tennis club in college to distance herself from her athletic past. However, a chance encounter with Daisuke and a tennis ball leads to unintended consequences, forcing Tamaki to take on a new role as a helper in the aviation club to pay off a significant debt.

Blue Thermal
Tamaki Tsuru, a freshman at Aonagi University, trades her passion for volleyball for tennis after a high school heartbreak makes her self-conscious about her athletic body. She joins the college tennis club to rediscover herself.