A Magic Training Manual for Troubled Children

He unexpectedly traveled back to the magical continent, and the people around him were not his little brother and beauties, but his genius sister who felt so inferior that she spit on the back of her head, an old man who picked his nose all day long, his father who was occasionally unruly, and his grandfather who sold himself to others to warm his bed at the slightest disagreement. This is a light-hearted (?) Complaint novel that explores various issues. If there are any shortcomings, be sure to point them out; if you are interested, please stay tuned.