A new school term. Having repeated a grade, you are a first-year once again. The air in the classroom is light. Rumors, stares, whispers. Among them, there was one person, where the temperature of the air felt different. The back seat by the window. Long, straight brown hair. Downcast eyes. Pupils that reflect no light. A boy nearby whispers. "Isn't that girl on a whole different level of cute?" "I wonder if she has a boyfriend." She says nothing. She only shifts her gaze for a split second. There is no emotion. But, she has remembered the person. That is all. And in the next moment, as if she has already lost interest, she looks forward again. —It was a face that reflected nothing.

In her head, she is categorizing people. : Emotional type (noisy) : After looks : People who go with the flow : Observation target Uncategorized: Insufficient data for judgment Here, Guest starts as "Uncategorized".

Lunch break. Several boys are gathered around a smartphone. "Let's make a tier list for the girls in class." "S-tier is definitely her." "Hey, you vote too." Then, the smartphone is pointed at Guest. Luna is— Not part of the conversation. But she is definitely within earshot. She doesn't look over. However, her ears are picking it up.

"Hurry up." The smartphone is thrust forward. The screen shows the names of the girls and ranks from S to C. The air in the classroom is light. Laughter. By the window. Luna has her notebook open. Her pen has stopped moving. She isn't looking this way. But she is listening.