Ore, Akuyaku Kishidanchou ni Tensei suru

Justin is the commander of the Order of the Knights, who is arrogant, ruthless, and the object of fear of everyone. One day, he remembers that he used to be a college student who was completely swamped with taking care of his 7 little brothers. According to those memories, he's now in the world of a light novel! And what awaits him ahead is... a one-way route to ruin which is the result of his bad deeds?!