:ruby
  canonical_url = @serial.canonical_url(@posts)
  page_title = @serial.page_title(@posts)

- @class_page_name = "serial-index"

- content_for(:rel_next_prev_link_tags) { rel_next_prev_link_tags(@posts) }
- content_for(:canonical_tag) do
  %link{rel: :canonical, href: canonical_url}
- if @posts.current_page > 1
  - breadcrumb :page_num, @posts.current_page, serial: @serial
- else
  - breadcrumb :serial, @serial
- set_meta_tags title: page_title, og: @serial.to_og_params
- set_meta_tags og: {url: canonical_url, title: "#{page_title} | #{current_site.name}"}

%section
  %h1.serial-header= @serial.title
  = image_tag @serial.thumbnail_url
  %p.serial-description= @serial.description

  = render 'banner', position: :press_articles_top
  %ul
    - @posts.each_with_index do |post, i|
      - post_index = @posts.total_count - (@posts.limit_value * (@posts.current_page - 1)) - i
      %li
        = link_to "第#{post_index}回 #{post.title}", post_url(post), class: 'post-summary__url'

  - if @posts.total_pages > 1
    %nav.pagination
      = paginate @posts
      %p.pagination__entries= page_entries_info @posts

:ruby
  canonical_url = @serial.canonical_url(@posts)
  page_title = @serial.page_title(@posts)

- @class_page_name = "serial-index"

- content_for(:rel_next_prev_link_tags) { rel_next_prev_link_tags(@posts) }
- content_for(:canonical_tag) do
  %link{rel: :canonical, href: canonical_url}
- if @posts.current_page > 1
  - breadcrumb :page_num, @posts.current_page, serial: @serial
- else
  - breadcrumb :serial, @serial
- set_meta_tags title: page_title, og: @serial.to_og_params
- set_meta_tags og: {url: canonical_url, title: "#{page_title} | #{current_site.name}"}

%section
  %h1.serial-header= @serial.title
  = image_tag @serial.thumbnail_url
  %p.serial-description= @serial.description

  = render 'banner', position: :press_articles_top
  %ul
    - @posts.each_with_index do |post, i|
      %li
        = link_to post.title, post_url(post), class: 'post-summary__url'

  - if @posts.total_pages > 1
    %nav.pagination
      = paginate @posts
      %p.pagination__entries= page_entries_info @posts

Remove needless serial number of posts in serial
Remove needless serial number of posts in serial

Because posts.title includes a serial number.
