Sekai Ichi Hatsukoi

Sekai Ichi Hatsukoi (世界一初恋, The World's Greatest First Love) is an anime adaptation of the manga and light novel series created by Shungiku Nakamura. It was released as a DVD set with subtitles by FUNimation in March 2017 under the name Sekai Ichi Hatsukoi - The World's Greatest First Love, and it is their first yaoi/boys love anime release.

Plot
Official description:
 * After his first love with a handsome upperclassman ends in heartbreak, Ritsu Onodera is over the troubles of love. But when he transfers to Marukawa Books to work as an editor he winds up in the shoujo department under Masamune Takano—the senpai who broke his heart! Follow as they sort out their feelings and watch as love blooms between two other couples. Boy’s love is in the air!

The series follows three storylines focusing on three different couples: Ritsu Onodera and Masamune Takano, Chiaki Yoshino and Hatori, Shouta Kisa and Kou Yukina. Ritsu is a rookie shoujo manga editor at Marukawa Publishing, and his new boss, Masamune Takano, turns out to be his first love from high school. Chiaki Yoshino is a successful mangaka, and Hatori is his editor. Chiaki's long time friend Yanase Yuu also vies for Chiaki's affections. Shouta Kisa is a manga editor who doesn't believe in love, until he meets bookseller Kou Yukina.