Takamine and Sakura, who attend different high schools, slowly deepen their relationship. Hirose, who watches over them, feels a complex mix of emotions. There are "questions" and "lingering feelings" about Takamine, who quit the same volleyball club. There is also "envy" and "jealousy" towards Sakura, who is next to Takamine. Despite harboring these feelings, Hirose finds herself in a unique situation──. The second volume of the blue spring of girls nurturing a special relationship that is neither friendship nor romance.