The strongest and worst secret boss, aim to avoid the destruction flag together with the reincarnated person

Summary

Schneizel, the second son of the prestigious Arclight family, is exiled after it's discovered he has dark magic. This event sets him on a journey to find the Evil G** and demand to know why dark magic is so despised.nnBut Schneizel has a secret: another personality named Sanada has been living inside him since childhood, and he's taken over! According to Sanada, if things continue as they are, Schneizel is destined to become the "strongest and most evil final boss" and be destroyed.nnTo break this desperate death flag, Schneizel's fight has begun!