【WARNING】 Boy x Boy stuff. Don't watch if you don't like. - TSUNDERE (ツンデレ) is a combination of the two words tsuntsun (ツンツン) defined as "aloof, morose, pointed", and deredere (デレデレ) defined as "exhausted, lovestruck". It can describe a personality that is good-willed, but its attitude and actions often contradict its nature.