Is asking an A Type for cold medicine the best on sick days? What does a B Type wish for on New Year's? Can an AB Type really outsmart a demon? What are O Types like when they end up in the hospital? Which type has the best plan for the dreaded Valentine's Day and White Day at the office scenario? Find out the answers to these typical situations and more in the fourth season of Ketsuekigata-kun!

Telegraph Pole Society, a mysterious group, is planning to conquer the world. The principal of the local high school forms a Defense Force by recruiting students from school: Shogi Morita, Kuho Tasuke, and Akiko Ifukube. Meanwhile the high school crazy scientist, Dr. Inogami, has turned a local boy, Kami Sanchin, into a cyborg. They might just defeat the Telegraph Pole Society with the help of the cyborg, or maybe not... (Source: AnimeNfo)

In a dystopian future, two friends dream of freedom... and gain more than they bargain for! Hothead Zed is on the run from the authorities, while his brainy pal Noah struggles with his own battered body. Both find a magical world that seems to offer escape and power undreamed of. Join Zed and his powerful, rebellious spirit Amir Gaul on their search for the ultimate power. It's a force that can save the world—or destroy life as we know it. This is the world of KIBA! Where you must harness the power within and fight with all you got! (Source: RightStuf)

A is the retelling of the original anime's finale.