Tensei Oujo wa Kyou mo Hata wo Tatakioru / 転生王女は今日も旗を叩き折る
Rank: 408th, it has 5945 monthly / 71133 total views.
Authors: Bisu / Tamaoka kagari
Genres: Manga / Adventure / Comedy / Demons / Drama / Fantasy / Isekai / Reverse harem / Romance / Slice of life
Status: Ongoing
Summary:
I was reborn as a princess in the world of an otome game, with memories of my past life.

Wait, what? I'm the heroine's love rival? No way! I have zero intention of falling in love with any of those losers, because I've set my eye on a support character--the Commander of the Royal Knights!

Except the heroine--after being reincarnated in this shitty game where the support characters are way better than the love interests--is threatening to destroy my own life with flags, and I'm determined to strike them down!
Resources:
https://www.novelupdates.com/series/tensei-oujo-wa-kyou-mo-hata-o-tatakioru//