Gun-ota ga Mahou Sekai ni Tensei Shitara, Gendai Heiki de Guntai Harem o Tsukucchaimashita!? by Meikyou Shisui

Translated from Japanese Action Comedy Fantasy Romance Adventure Harem Magic Demons Slaves Ecchi Elves
Hotta Youta is killed while returning home from work on a cold evening. He wakes up being carried by a bunny-eared woman! Featuring Reincarnation, Guns and Harem, its a Gun vs Magic Story that gives Hotta Youta a new lifeā€¦ and an edge!

Alternative names :

Volume 1
Volume 2
Volume 3
Volume 4