This article extends literature of Organizational Citizenship Behavior (OCB) in the context of corporate sustainability. The author presents the concept of Organizational Citizenship Behavior towards Sustainability (OCBS) as a variant, contending it's appropriateness for today's much needed behavioral competence to implement sustainability measure at organizational level. The formulation of OCBS espouses Organizational Citizenship Behavior (OCB) with a twist. The viewpoint defended that a form of constructive controversy in behavioral attribution as oppose to compliance is necessary in the development of proactive and creative competence for corporation to meet multiple stakeholder's needs and demands towards organizational, economic, social and environmental equity. The study identifies key determinants of OCBS, including sustainability culture, leadership support and organizational commit.