"Concave and Convex World" is a derivative of the original work, a parallel world, without interfering with the main line of the original work
Due to a small mistake by Jin, there was a problem with the robot he developed. This problem could not be solved by Jin alone. By chance, Jin got help from Gray. Just when everything was going smoothly, an unexpected accident occurred...
From a stranger who only knows his name to a lifelong lover OOC Apology HE
Intention: Support each other in ordinary urban life, and maintain the romance and stability that belong to two people in the busy life.