Alternative names: The World’s Greatest First Love: The Case of Ritsu Onodera (世界一初恋 〜小野寺律の場合〜, Sekai-Ichi Hatsukoi: Onodera Ritsu no Baai)
Author: Shungiku Nakamura
Official site: Sekai-ichi Hatsukoi
If you are here, I am going to assume that you know about Sekaiichi and Junjou Romantica because I know that not everyone watches these animes or reads the Manga. Today is about the Manga and a little bit about the Anime, a bit of a comparison might be seen farther ahead.