Translated name: I Became the Dark Wizard Who Rules Over the Heroines
Original name: 나는 여주들을 지배하는 흑마법사가 되었다
Translation status: Completed
Translation Group: Novelpia Global
Chapters: 103
Link: https://global.novelpia.com/novel/2218
Format: EPUB or PDF. :)
I remember this novel was once published on Fenrir, but it was deleted.