The Savior After the World's Destruction

"HXD, how did my panoramic photos turn out?"

"They're ready. They turned out great."

Walking along a mountain path, the boy forced a smile. "Besides a meteor, there's a person wearing a skinned monster costume waving at me. Oh, and a strange coffin fell from the sky. Wait, I just took another photo of a faceless man hanging upside down and smiling at me."

"?"

"Don't worry. I'll take one more behind me. Just let me disappea..."

This book also goes by the title:

How I Got Tricked by My Group Chat into Taking Photos, Found a Strange Coffin, and Somehow Became a Player