Morita Mayu is a high school girl featured in a 4-koma. While her classmates enjoy school life, she remains extremely reticent. Her tendency to look straight into people's eyes is wrongly interpreted as unfriendliness. Contrary to popular belief, Mayu is not silent because she dislikes talking nor because she can't find anything to talk about. She simply thinks too much before speaking and often misses the perfect timing to speak. Despite this quirk, Mayu leads a joyful life among her classmates.