The Adventure of Traveling Through Time and Becoming a Beast-Eared Girl

Well~ The cause of death of the protagonist is unknown. He may have fallen into the sewer due to boredom, or he may have slipped and hit his head on a banana peel on the road one day. Anyway, he has traveled through time, and in a fantasy world, he has become a loli with animal ears, and is suspected to be a slow red panda...