Sekai Ichi Hatsukoi - The World's Greatest First Love is a tV series anime that premiered in spring 2011, produced by Studio DEEN.

About the production: the story comes from a manga, there are 12 episodes of about 23 minutes and its current status is "finished".

Its main genres are comedy and romance, with themes such as Boys' Love, Primarily Adult Cast, Primarily Male Cast and LGBTQ+ Themes.

On AniList, Sekai Ichi Hatsukoi - The World's Greatest First Love has an average score of 70%, a good score, and appears on 34,627 users' lists.

The franchise continues in or follows from: Sekaiichi Hatsukoi 2.

Onodera Ritsu has just transferred from his father's publishing company to Marukawa Shoten. Assigned to the shoujo manga division, he crosses path with the person he'd least expected to meet. Takano Masamune is the editor-in-chief of the division Ritsu's been assigned to, and the two seem get off on the wrong foot right from the very start when Takano unexpectedly kisses him. However, there is more to than what meets the eye: Takano is actually Saga, Ritsu's senpai and high school love, whom Ritsu had thought to have played him for a fool by taking his affections for granted when he confessed and summarily dumped him.

Official synopsis from AniList.