A-gata-kun, B-gata-kun, O-gata-kun, and AB-gata-kun return to investigate further cultural stereotypes linked to blood types. Aided by their female counterparts, the blood types examine various relationship-related subjects, including personal charms, how to respond to a mediocre gift, and... how to correctly conceal adult material on a computer? Whether stuck on a deserted island or sharing a dorm room, no two blood types will react identically to any of these funny yet familiar scenarios.