Stand Up! (yamakawa Aiji)

From Dazzling Scans: Furuya Utako is shy and reserved, but because of her height (172cm), she sticks out like a sore thumb. Her mind is constantly plagued by thoughts of Harada Naoyuki, the popular boy who sits next to her in homeroom and claims that he'd like to be friends. She is a bit surprised at his straightforward attitude, but slowly the distance between them is starting to close...