Isekai ni Kyuuseishu to Shite Yobaremashita ga, Around 30 ni wa Muri na no de, Hissori Book Café Hajimemashita.

Tsukina is summoned to another world and is told by a talking orb who introduces itself as a god that she is to be the savior of another world and that she is to balance it with her high magical power, whatever that means. Being already in her thirties, she refuses at first and tells the orb to leave it to those that are younger. Though there are...