Black Haze

Long ago, a "door" connecting to another world opened, and those who gained special abilities along with a "mark" began to be called "wizards." After the incident of "that day," Ophion's first-class wizard "Blow" became very famous. One day, he receives a very special request. It is to protect the second son of the Artian Duke family, who is being called a "monster" and suffering at the "Magic School Helios"! Thus, Blow enters Helios as a student under the name "Rood Krisch" while hiding his identity... Will Blow be able to successfully complete the request amidst the whirlwind of unexpected events?

(Source: KakaoPage, translated)