Buddy Complex (2013)

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.

Buddy Complex is an anime show featuring Yoshitsugu Matsuoka.

Buddy Complex is currently streaming for free (ad-supported) on Crunchyroll and Tubi TV and it's also available on Crunchyroll, Crunchyroll Amazon Channel and Funimation Now.