[DeepL Translation - needs review] Introduction to Volume 1: [60,000 words added from the web version!
I was reincarnated as the villainess Yumiera in an RPG-type otome game. But actually, Yumiera is a character who is not very good in the main story, but after the ending, she reappears as a back boss and competes with the heroes--in other words, she is an extremely high-spec character! My gamer spirit was ignited, and as a result of my training, I had reached level 99 by the time I entered...
To paraphrase the afterword, by volume 3 the series became a complete misnomer. Both 悪役令嬢 and 魔王 elements are gone with the wind, and the title could be shortened to just "I'm the ultimate secret boss".
In a welcome change, volume 3 dials back on teen romance a little bit. Once again there is adventure, intrigue, combat, world-building elements and attempts at tension.
Fundamentally the series is a situational comedy. The MC constantly makes wild leaps of logic and behavior to facilitate that.