Higeki no Genkyou to Naru Saikyou Gedou Last Boss Joou wa Tami no Tame ni Tsukushimasu. The Savior's Pride

At the age of 8, Pride remembers her memories from her previous life and realizes that this is the world of an otome game and that she is the final boss queen. In order to change the worst future, she prevents the tragedies of the capture targets. Months have passed since then, and Pride's 16th birthday is approaching. At the birthday celebration, Pride's fiance is scheduled to be announced, but Pride, who has been working hard on preparing the school system, has completely forgotten about it. (Source: Natalie, translated)