Abijyn's manga / #Alchemist(1)

My Brothers, the Protagonists Lee Gwihan, eldest brother, disappeared in a rift, returns after 6 years. He transmigrated and became the demon king, then regressed to present. Lee Haegi, second brother. He defeated the demon king and earned the right to regress.  Lee Hanseng, youngest brother, was in coma for 8 years. He is possessed by a duke's son from another world, Farsei de Transmigratoria, probably his previous life. Lee Bobae (24), alchemist. Han Hyunwoo, battle alchemist Choi Johan, crimes of the awakened dept Park Mano, Haegi’s futur girlfriend