neet de otaku na kunoichi to naze ka dousei hajimemashita
ニートでオタクなくノ一となぜか同棲はじめました ニートくノ一となぜか同棲はじめました ニートくノ一 Somehow,_I_Started_Living_With_a_NEET_Otaku_Kunoichi neet_kunoichi
Webmanga by koyuki.
A salaryman, Atsumi Tsukasa, lives with a kunoichi, Ideura Shizuri, that protects him from demons summoned by an ancient family curse. However, when not slaying monsters she spends her time as a layabout game otaku.