Glenn is a bastard who only sleeps instead of teaching class at the Alzano Imperial Magic Academy. When one of his excellent students, Sistine, finally gets fed up, she challenges him to a duel to make him teach properly.

Even after losing the duel, Glenn lacks all motivation. Yet through his interactions with Sistine and Rumia, he eventually starts genuinely teaching classes that will help them. Meanwhile, suspicious men show up at the academy...

Rumia comes becomes a suspect during the magic competition and the imperial guard targets her life. Glenn manages to save her in the nick of time, but an unexpected individual stands in his way.

The ones pulling the strings behind the imperial guard were the Researchers of Divine Wisdom. Glenn fights to clear Rumia of suspicion. Meanwhile, in the magic competition, the students of Class 2 face…

Mortally wounded, Glenn manages to hang on by a thread thanks to Sistine's magic. They chase after Re=L who kidnapped Rumia, and Glen storms into the white alchemy lab alongside Albert.

Glenn and Leos enter a duel involving the other students in a magic corps battle. Leos's camp is well organized, but Glenn fights back with clever tactics.

Preparations begin for Sistine and Leos' wedding ceremony. Rumia holds out faith that the vanished Glenn will return, but they still have no word from him by the day of the wedding.