Gunota ga Mahou Sekai ni Tensei Shitara, Gendai Heiki de Guntai Harem o Tsukucchaimashita!?

advanced knowledge meets archaic world animal characteristics bad art based on a novel beautiful female lead betrayal big breasts bullying bunny girls calm protagonist cat girls centaurs changed man character growth childhood friends demon girls demon-human relationship discrimination dog girls drawn by hentai artist elf/ves enslaved male lead enslaved protagonist fast romance fear of abandonment female fighters friends become lovers group intercourse guns gunfighters gunsmiths handsome male lead hard-working protagonist harem-seeking male lead hidden past hikikomori human-nonhuman relationship inventors journey kemonomimi lamia lifestyle change love polygon mages magic magic against guns magic school marriage metalsmith monster girls monsters muscular females naive male lead orphans orphanage otaku partial nudity past plays a big role personality changes polite male lead polygamy rebirth reincarnated in another world reincarnation rescue revenge searching for someone secret identity sexual innuendo sexually active protagonist slaves slavery smart male lead snipers social hierarchy strategic minds strong female lead strong-willed male lead sudden servitude survival swords against guns time rewind time skip tragic past training traitors transported to another world trust issues undergarments vampires wars weak to strong