"Does love feed you?" Love is nothing more than something inferior to ice cream and doesn’t feed you; it’s a positive emotion only from a wasteful perspective, believed by the tempestuous high school senior, Guk Ye-young. One person intertwines with her, like a coincidence that feels like fate. "I hate people who laugh without reason the most. Those people hide their true feelings and act innocent." A unique and special gaze that resonated from the start. A bulldozer that ignores others and charges at just one person, the 25-year-old teacher, Bae Ah-reum. "You have a sharp tongue." "......" "Cute." She thought she was just a fool who only knew how to smile, but unexpectedly, there’s a scary side to her as well. "I don’t really know you, teacher." "I thought I knew everything about you." A person who naturally seeped into Ye-young's life, who didn’t want to know what she didn’t know and didn’t want to say what she knew. That summer, that fleeting moment of Lethe was love.