Quick Transmigration, Male and Female Leads. I Read It Before but Can’t Find It Now. Please Help

The male lead is yandere, and the heroine is rather gentle. I think the novel was completed. The ending goes like this: It's set in an interstellar world, and the heroine is a general. The two sides are about to make peace, so she has to be eliminated. The male lead was saved by her when he was a child.