新妹魔王の契約者 [Shinmai Maō no Tesutamento] [The Testament of Sister New Devil] #1

Kadokawa's The Testament of Sister New Devil launches with this striking volume one cover, showcasing a dark-haired young man in a school uniform alongside a fierce red-haired girl wreathed in dramatic bursts of flame and dark energy. The artwork crackles with tension, setting a tone that blends high-school life with supernatural conflict right from the first glance. If you're drawn to action-heavy manga with a bold visual style, this opener makes a compelling case for the series.