I liked! Wasn't too short for me. The pace felt a bit weird though but that might just be me disliking characters talking for minutes when others are being eaten alive.. Nitpick I guess.
Also the gore scene was kinda out of nowhere. I don't mind gore, but I feel it could have had WAY more impact. Some writer could maybe give a better example, but what i'd do is make the scene more personal. First, i'd make the woman someone you know. Then i'd set the scene so you can see her alive before the monster eventually eats her. Then the mc can go apeshit. Usually impactful scenes like this should be used to convey some important message right? Like the brutality of the world. Which means they would have to come from a side of peaceful carefreeness. This is pretty common in isekai anime tbh, when mc acts like the world is a video game and then boom, someone he knows gets chopped up.
Although it's kinda cliche, if she was running around smiling in a scene before the war, you might have gotten a dry tear from me.
Also I kinda wish mc was more serious about fighting. He acts like it's a game when he's meant to be this hero in the service for 5+? years. I think playful banter is still possible during action, but need to make sure it doesn't interfere with battle. Or that innocent bystanders aren't currently being eaten alive in the background i guess.
Keep it up though! I actually really like reading this VN.