Worm-ly Ways is one of the few side-quests in Onimusha: Way Of The Sword where the game doesn't tell you exactly where you need to go, similar to the Hidden Treasures quest.
If you don't want to waste time searching every nook and cranny, and just want to get this quest done ASAP and get your upgrades, we're here for you. It took us a bit to find the exact locations, but we hope our images and directions can help you finish this quest just a bit faster.
Your first location is actually inside a medium-sized dark house, with a little vegetable garden in front. You'll see a lot of Genma in the area, so if you don't want to waste time fighting them, just head inside the house, and you'll initiate the first cutscene and be forced into an easy battle. After the fight, you'll be able to leave the house and head for the next location.
This one took us a while to figure out. You're looking for a courtyard. Not just any courtyard, mind you, but a sealed-off one, where the only way in is to crawl inside. Head to the location in the image and you should see two basic Genma soldiers guarding a broken part of the fence. Deal with them, and crawl under the fence where you'll be forced into another battle.
Fortunately, after this battle, you'll have just one more location, but it will be clearly marked on the map, and you can even use the guiding light to track it down. Head there, talk to the man in front of the house and get ready for a semi-tough battle. You'll have a few of those brute Genma here, but it shouldn't be anything you can't handle.
After the battle, enjoy the creepy epilogue and your upgrade items.
سەرچاوەی فەرمی بە زمانی ئینگلیزی: https://www.thegamer.com/onimusha-way-of-the-sword-worm-ly-ways-quest-location-walkthrough/