Master's coffee is extremely disgusting.

Miyama Rikka was exhausted from being battered by the harsh waves of society. One day, she discovered a hidden gem of a café where her heart could find peace. However, the coffee made by the master, Kusunoki Yuuri, was so incredibly terrible that "muddy water" didn't seem like an exaggeration. "In all my time running this shop, about 50 customers have come through, but you're the only repeat customer I've ever had." This is a story of these two on a certain afternoon.