Until It Cools Down

Is it soup that gets cold? Or these feelings for my friend? What choice does she make when she realizes her feelings?

High school girl Azusa is going out with her classmate Kento. He introduces his childhood friend Mariko to Azusa, and being in the same class, they become close. As Azusa and Mariko's friendship deepens, Kento begins to feel distant from Azusa.