Yamada and Kase-san. (1) Even though Kase-san and I are both girls, we have been together for a long time――. Yamada, who has just enrolled in the horticulture department of a women's university, and Kase-san, who is busy training at a physical education university. Since classes started, the two of us haven't had much time to meet, but we promised to celebrate Kase-san's birthday together…. Should we try changing how we call each other a little bit…? Yamada and Kase-san's sparkling youth diary☆ The shiny college student chapter begins!