Weiss Kreuz OVA

Synopsis:

After Akira and his sister Kaori are falsely assumed dead in the accident that killed their parents, they are now seeking revenge on the organization responsible for the deaths, even if it means breaking the law. Weiss Kreuz is asked to stop this duo from committing their illegal activities, but Aya and Yoji are the only two who accept the mission. While carrying out their plans, the entire Weiss team finds themselves in the lair of death and deceit. Will the organization's ruthless plan mean the fall of Weiss?