Reincarnated in a Mundane World with a Green Scarf

He worked hard for a simple, great life. Good grades, friends, a nice family, and a girlfriend were the result of his undeniable efforts to overcome his social awkwardness, sadness and procrastination. Finally, after all that hard work, things were going as they had to. Yet, just before summer, everything changed. After getting hit by a truck, he woke up, half naked, on another world. The only thing he had was a giant, ridiculous green scarf. Coul it get any worse than that?