Kokoro Curtain

Kagami is finally able to confess to the one she has a crush on for a long time, Shuuhei-senpai, but it turns out bad when Shuuhei-senpai dumps her and says that it was not love that Kagami has for him. While Kagami keeps thinking about what love is, Kagami meets Toochi Eda, another carefree senpai. (Source: Shogakukan, translated)