Gibo-san wa Tennen Aji

The book is a collection of stories spread over ten chapters. The first story takes place over two parts and uses the title of the book, Natural Taste. It's about one Shii whose mother is more than just a bit clueless about how she dresses in front of her son and just in public. The rest of the stories in the collection has either the woman forcing herself on a surprised younger man or neighbor or vice versa.