Boku To Kanojo No Meguru Isekai summary:

Takayoshi, an otaku, was murdered by a female stalker named Kurona. He ends up reincarnated in a fantasy world where he is living his isekai fantasy as a hero who is adored by a harem of girls, but unfortunately, his stalker Kurona, after getting killed by the impact from the truck she stole, also ends up in the fantasy world. Now reincarnated in another fantasy world by the goddess he encountered, Takayoshi must be careful with which female he can trust, as Kurona still follows him and may be any one of the women he may encounter, ready to strike at him at any moment.