My Days with the Demoness

Story After losing his best friend, a fellow college student, Asaki Tomohiro, turned to the NEET life, and began obsessing with the idea of creating a portal to another world. One day, he managed to finish the prototype and upon testing it for the first time, caused quite the accident the device brought a girl into this world, who introduced herself as the daughter of a demon lord in her own world, Nero Ei Vixonni. With the prototype broken and trapping Nero in this world. Asaki promised to fix it but with a catch - hed have to do it in just one and a half months. However in the mean time, Ner...