Makoto Itou, a high school student, develops a strong interest in Kotonoha Katsura after seeing her for the first time at the start of his second semester. He's unable to approach her due to shyness, so he secretly takes a photo of her and sets it as his phone wallpaper, believing this will help him confess his feelings to her. Sekai Saionji, a classmate, discovers the photo but instead of revealing Makoto's secret, she offers to help him get closer to Kotonoha by befriending her. This leads to an unlikely friendship between the three.