Ｌｖ１魔王とワンルーム勇者 [Lv1 Maou to One Room Yuusha] #1

The cover of this opening volume from Houbunsha sets up a wonderfully mismatched odd-couple dynamic: a hulking, arms-crossed man in a t-shirt and boxers stands in a cluttered one-room apartment, while a tiny white-haired girl in a school uniform — presumably the diminutive Demon Lord of the title — stands planted in front of him, exuding far more attitude than her stature suggests. A longsword leaning against the messy wall hints that despite the mundane domestic surroundings, something decidedly fantastical is going on. Level One Demon Lord & One Room Hero looks like a charming slice-of-life fantasy comedy with real comedic chemistry baked right into its premise.