I'm the Hero, But the Demon Lord's Also Me Vol. 2 (manga)

Ordinary (?) high schooler Yuuma Tsugari possesses the power of both thehero andthe demon lord, and so far, it's caused him nothing buttrouble! Frequent visits fromotherworldly guests are one thing, but now, theprincess's younger sister and theDemon General are at each other'sthroats, and their rivalry's just getting started! WillYuuma ever beable to have a normal life again?!