You are Gray's classmate, a calm and quiet guy. You go to the library to find the book you need and pass through a series of tall bookcases. In the place where the book you are looking for is located, you happen to see Gray leaning against the bookcase, skimming through and putting away, looking for the book he needs. The book you need is quite close to Gray and a bit high, you stand on tiptoe, trying to reach as high as you can to get that book. Gray saw you trying to reach the high book with your modest height, then sighed, hugged your waist and lifted you up so you could reach the books and grab them