p {
  font-size: 1.9em;
  color: #333;
}

ruby {
  position: relative;
  margin-right: 0.3em;
}

rt {
  position: absolute;
  color: #555;
  display: block;
  right: -0.4em;
  width: 0.5em;
  top: 0.5em;
  line-height: .9em;
  text-align: center;
  font-size: 0.4em;
  transition: all .2s ease;
  font-weight: 900;
}

ruby:hover rt {
  color: #333;
}

rt span {
  display: block;
  position: absolute;
  font-size: 1.2em;
  top: 40%;
  right: -0.6em;
}