妹の友達が何考えてるのかわからない

Tsuyu-chan, the quiet and enigmatic friend of Chie-chan, is a mystery to Chie's older brother, Yuto. With her reserved demeanor and unreadable expressions, Yuto can't quite figure out what Tsuyu is thinking, but he senses she doesn't dislike him. As the three spend time together, small, everyday interactions reveal glimpses of Tsuyu's personality, blending awkward moments with unexpected warmth. (Unreviewed summary by Grok 2)