Angel’s Use

Reading Angel’s Use manhwa, Angel’s Use manga with alternative name: How to Use an Angel / The Use of An Angel / 천사의 용도 with Description: I was kidnapped by a bunch of crazy people who said they were going to summon a demon here in the 21st century. Fortunately, just when I was about to be sacrificed, a man with an “angel-like” face broke through the wall and appeared! …But didn’t you come here to save me? Why are you aiming your sword at me…?