'The World's First Love' and 'Pure Romance' were both Japanese light novels by Shingo Ishikawa and Akio Watanabe. They all appeared in the works of the same author, so there were some similarities. " The World's First Love " and " Pure Romance " both described the love story of adolescent men and women. In " The First Love of the World's Number One," the protagonist, Uno Kuri, met a boy named Kouta Hongo in high school and gradually developed an emotional entanglement with him. In " Pure Romance," the protagonist, Hinata Hinata, met a boy named Kazuya Uesugi in high school and gradually fell into a relationship entanglement. Both works depicted the relationship between adolescent men and women and involved topics such as love, friendship, and family. At the same time," The World's First Love " and " Pure Romance " also had some unique plots and character settings that made them famous and influential in Japanese light novels. Although " The World's First Love " and " Pure Romance " had some similarities in terms of storyline and character setting, they were original works by their respective authors and had different storylines and topics.