Monstrous Senior Sister and Master, I'm Forced to Cheat

Transmigrated as a demon sect disciple, he wanted to keep a low profile. But everyone around him was a monster. Senior Sister No.1 is a demon princess with the Demon Emperor's legacy. Senior Sister No.2 is the daughter of Heavenly Poison—a wave of her hand can poison a whole city. Senior Sister No.3 has the Demon Phoenix bloodline and casually triggers world nuclear peace. Junior Sister is the reincarnation of the Extreme Ice Empress—a snap of her fingers freezes ten thousand miles. His beautiful master? A former titan of the immortal realm. With no choice, the protagonist awakens his system a…