#first_box {
      display:flex;
      margin-bottom: 30px;
  }
  
  #all_games {
      width: 33%;
      padding-right: 5px;
      border-right: #AAA solid 1px;
  }

  #only_erogame {
      width: 33%;
      padding-right: 5px;
      border-right: #AAA solid 1px;
      margin-left: 5px;
  }

  #only_not_erogame {
      width: 33%;
      margin-left: 5px;
  }

  #second_box {
      display:flex;
  }
  
  #coterie_games {
      width: 33%;
      padding-right: 5px;
      border-right: #AAA solid 1px;
  }

  #coterie_games_only_erogame {
      width: 33%;
      padding-right: 5px;
      border-right: #AAA solid 1px;
      margin-left: 5px;
  }

  #coterie_games_only_not_erogame {
      width: 33%;
      margin-left: 5px;
  }