Buddy Complex is a tV series anime that premiered in winter 2014, produced by Sunrise.

About the production: the story comes from an original script, there are 13 episodes of about 24 minutes and its current status is "finished".

Its main genres are action, drama, mecha and sci-fi, with themes such as Time Manipulation, War, Military and Real Robot.

On AniList, Buddy Complex has an average score of 67%, a good score, and appears on 21,145 users' lists.

The franchise continues in or follows from: Buddy Complex Kanketsu-hen - Ano Sora ni Kaeru Mirai de.

On the first day back after summer break, high-school student Aoba is attacked by a giant robot that appears out of the sky. As he's pursued through the city, his classmate Hina appears in a robot of her own. She rescues him, and tells him cryptically that "Dio is waiting for you," before she disappears. This begins Aoba's new life as the pilot of the Free Treaty Alliance against the Great Zogiria Republic. (Source: Anime News Network)

Official synopsis from AniList.