Manga search please help

It’s about a boy that is testing out a new virtual reality game, the test finds a the company location and a sleeping pod is used, after he transfer to virtual reality he is captured and has to Relife every time he dies, setting is castle khight war, he has to defend his castle, he is the lord or some sort of, he repeats the day like few hundred times and the only thing that keeps him going is a female knight, that is nerfed after the company realize that, he then finds her in the hospital and the sister or nun tells him the only way to bring her back is some one time superwomderitem, but first he has to repel the incoming enemy. Hope someone can help me find this Ian looking since few weeks for this but it’s hopeless till now