If you're looking for manga similar to Kaijuu Girls, you might like these titles.
Journey back to Lodoss Island for tales of dragons and dwarves, paladins and princesses, magic and...madness?! All your favorite characters from Record of Lodoss War are back and sillier than ever in this series of madcap short strips that poke fun at all the high fantasy stereotypes you have come to love.
Koha-Ace stars Kohaku and features characters from various TYPE-MOON series. It is drawn in a super deformed style, and it is a self-aware series that constantly breaks the fourth wall.
Dr. Einstein identified a world-ending phenomenon known as the Vodka Girls. Dr. Tesla has been dispatched to end their cataclysmic spree across the multiverse. Will she succeed?
Eren and Mikasa enter a new school-- Titan Junior High! However, Eren's hated Titans for years-- can he get along with his new (harmless?) classmates? Featuring all of the characters from the main series as you've never seen them before, this series is sure to delight fans of Attack on Titan with a human vs. Titan volleyball match, a Titan rock band, and much more!