Wahihi's Happy Christmas Kakko Kari

The main character, Wahi Kaminaga (commonly known as Wahihi) and his classmates are always excited! Excited! Very happy! ! I lived my high school life with this as a catchphrase. Originally, Wahihi's ancestor had an grandmother who was a wizard of the sun, and due to that ancestor's inheritance, Wahihi spent her childhood hiding the fact that she was a wizard of the sun.
Years have passed since then, and Wahihi, now 16 years old, enters a boarding high school and enjoys a fun high school life with his classmates. Meanwhile, the time finally came for Wahihi to encounter the shadowy magician, and this was the beginning of a very harsh life for Wahihi.
This song depicts the Christmas scene from the previous year, when Wahihi faces trials.