README.md in naniyatsu-0.0.1 vs README.md in naniyatsu-0.0.2

@@ -1,11 +1,10 @@
 # Naniyatsu
 
-Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/naniyatsu`. To experiment with that code, run `bin/console` for an interactive prompt.
+We are stupid.  
+We can't remember `instance_of?`, `kind_of?` and `is_a?` method.  
 
-TODO: Delete this and the text above, and describe your gem
-
 ## Installation
 
 Add this line to your application's Gemfile:
 
 ```ruby
@@ -20,24 +19,48 @@
 
     $ gem install naniyatsu
 
 ## Usage
 
-TODO: Write usage instructions here
+```ruby
+require 'naniyatsu'
 
+class Hoge
+  extend Naniyatsu
+end
+
+class Fuga < Hoge
+end
+
+class Piyo < Fuga
+end
+
+Hoge.new.hoge? # => true
+Fuga.new.hoge? # => true
+Piyo.new.hoge? # => true
+
+Hoge.new.fuga? # => false
+Fuga.new.fuga? # => true
+Piyo.new.fuga? # => true
+
+Hoge.new.piyo? # => false
+Fuga.new.piyo? # => false
+Piyo.new.piyo? # => true
+```
+
 ## Development
 
 After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake ]spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
 
 To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
 
 ## Contributing
 
-Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/naniyatsu. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
+Bug reports and pull requests are welcome on GitHub at https://github.com/takuan-oishii/naniyatsu. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
 
 ## License
 
 The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
 
 ## Code of Conduct
 
-Everyone interacting in the Naniyatsu project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/[USERNAME]/naniyatsu/blob/master/CODE_OF_CONDUCT.md).
+Everyone interacting in the Naniyatsu project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/takuan-oishii/naniyatsu/blob/master/CODE_OF_CONDUCT.md).