From Pixiv creator DC Ultra, whose works follow the story of university student Anna Blackthorn, who has taken on the burden of being her planet's hero, Ultra.

After defeating Sue, Spectre helps Anna awaken to a new power inside of her, Ultra. Later, Anna is assaulted by a strange being in a strange dimension. Gallery contains Upgrade, Power (which starts on page 109), and Nightmare (which starts on page 290).

Pixiv - https://www.pixiv.net/en/users/13098329

Vol 1: https://e-hentai.org/g/2808388/797d828c62/
Vol 2: https://e-hentai.org/g/2811481/5f0133ec90/
Vol 3: https://e-hentai.org/g/2813836/4619fdd99c/
Vol 4: https://e-hentai.org/g/2816633/009864d77c/
Vol 5: https://e-hentai.org/g/2819842/169ba1a35f/
Vol 6: Here