Mito-san to Yomogihara-kun, Tokidoki Shima-chan.

Kei Mito is a high school girl so stunning that she turns heads wherever she walks. Because of her cool and aloof aura, her classmates keep a respectful distance—but in reality, she’s just a girl with crippling social anxiety.

Her only friend in the world is Shima-chan, a stuffed long-tailed tit. One day, while Kei is out trying to enjoy the cherry blossoms with her plushie, she is caught talking to Shima-chan by her popular classmate, Yomogihara...

This is the story of Kei's daily life as she gradually tries to understand human relationships, supported by the ever-encouraging Yomogihara.