Gomen Asobase, Tonogata-sama!: 100-nin no Ikemen to no Flag wa Subete Orasete Itadakimasu

I was reborn as a baby in the world of "100 Loves," my favorite otome-game. The heroine is a popular girl who is courted by 100 handsome men, But my favorite character is the villainess Altina! If we become enemies in love as the game plot goes, I'll have to humiliate Lady Altina… That's impossible! So I must cut off all the potential budding romances and flags of love that are in my way, and let her have a happy ending! An unprecedented (⁉) flag-busting romance begins in spectacular fashion!

(Source: Comic Lake, translated)