Seishun's Shuusuke Fuji asks his younger brother Yuuta to go shopping with him to pick out a present for their older sister's birthday. As they proceed with their plans, Yuuta's teammates from the St. Rudolph Academy tennis team catch a glimpse of the two brothers and initially think nothing of it. However, St. Rudolph's manager, Hajime Mizuki, misinterprets the situation and believes Shuusuke is trying to get Yuuta to transfer back to Seishun. In an effort to stop his plans, Hajime forces the team to secretly follow the brothers around.
