Double Solid

The story starts from a couple of weeks after "Sonic Dive". Layla and Sigma are admired by citizens and adventurers for what they achieved. They have a rest for a while at a small log house in a forest near the town. But their peaceful life doesn't last long.... Their town is attacked by monsters. Sigma beats the monsters with the sword to protect the forest, but Layla gets the poison and goes into a coma. Sigma decides to fight again to get back Layla's smile...