Tonari no Wakao-san wa Miesou de Mienai

Story:

High school student Mizuno has a person that he's not good with. It's his seatmate Wakao-san. Mizuno is the only one who perceives Wakao's face as a blank slate, making it impossible for him to read any of her facial expressions. Furthermore, when Wakao tells him that she's using his expressions as "reference," the mystery surrounding her deepens?!