My Senior Sister Knows Magic

This is a world where science and magic coexist. Some people here pursue powerful magic, while others seek eternal truth. A master of science who came from another world and started as a little librarian, with magic in his left hand and truth in his right hand, he kicked open the door to the new century. Some call him the forerunner of magic, others say he is the founder of science. Some people also describe him this way. In the new century, Blair is the symbol of evil.