Guardian Hearts volume 3 features story and art by Sae Amatsu.

Kazuya is just getting settled into his new role as one of the Gaarts, but the evil organization BURN is out to conquer the world with... a sports festival? When BURN kidnaps Kazuya, it's up to Hina and the rest of the girls to save him - if they can stop getting in each other's way first! And what's this about Kazuya's long-lost fiancee? The drama in this house is getting out of control!