Three heroines have a lot of depth

The protagonist is your usual sent from earth and reincarnated in game like version of Japan except with Fate like system going on with a Magician War.

As he reincarnated as an Antagonist he stops committing crimes that would lead to get him killed and hopes to support the story to just live a quite life with his sister. This is ruined as the original game protagonist is useless and has no intention of following the plot of the story.

Losing faith in the protagonist power to ensure a happy ending as anyone other then the main heroine or original protagonist winning would mean the end of the world, he steps up to the plate to save the heroines from danger. This of course has the unintended consequence of the heroines falling for him.

How will our protagonist deal with these 3 women who are very intense in they're feelings.

All three Heroines have a lot of depth to their character and you can really tell why they feel the way they do as they struggle with expressing their feelings