nani ga warui
Song of the third ending of the Bocchi the Rock! anime. Sung by Suzushiro Sayumi, seiyuu of Ijichi Nijika.
The anime ending is most notable for a scene, in which a chibified Kita Ikuyo raises either her thumb or index finger (the latter according to the animation director). However, due to the nature of chibi hands, it is frequently interpreted as middle finger, resulting in a lot of fan art of Kita flipping off the audience.
