Yoshizawa Wakaba's long-time friend, Umezono Komaki, seems flawless with her intelligence and impeccable behavior. However, beneath her facade lies a disdainful and ruthless nature. Eager to best Komaki, Wakaba risks losing something significant in the process. After a defeat, Komaki demands a kiss as her prize, leaving Wakaba shaken. Determined to reclaim her pride, Wakaba challenges Komaki once more, only to face the threat of losing more cherished possessions if she fails, including dates, shared beds, and declarations of love. Despite the losses, an unexpected emotion blossoms in Wakaba's heart toward the one stripping her of these precious first experiences.