Naruto: I Have a Book of a Thousand Beauties

[Hokage + multiple heroines + ruthless + no saintly protagonist]

[Kills Naruto from the start. If you dislike that, don’t read.]

[Heroines so far: Kazahana Koyuki, Guren, Kurenai Yuhi]

The moment Xuanyuan Yi'an transmigrates, he finds himself inside Orochimaru’s underground base. He has a Book of Ten Thousand Beauties within him, but it can’t record the incredibly beautiful Snake Princess...

Xuanyuan Yi'an is baffled. Apart from the modified humans, where are there any beauties in this underground base...?