Former high school baseball star Ryuuji struggles to maintain his focus during a local shopping district game when the opposing team introduces provocative import players, Sandy Bash and Wendy Crawford, to distract him. After Sandy secures a victory with a miracle pitch, she orchestrates a romantic date between Ryuuji and Wendy that culminates in a passionate night together. Although the encounter begins as a scripted arrangement, Ryuuji and Wendy discover a genuine mutual attraction, leading to an unconventional bond under Sandy's mischievous guidance.
While working as a low-ranking helper at a hot spring resort, Ryuuji finds himself caught in a passionate tug-of-war between Sandy and Wendy. After a romantic encounter with Sandy is interrupted by a jealous Wendy, Ryuuji awakens with sudden amnesia, forgetting his relationship with both women. Seizing the opportunity, Sandy and Wendy compete to seduce the confused Ryuuji and convince him that they are his girlfriends.