Edit in JSFiddle

<fieldset>
   <legend>필수항목</legend>
   <p>
      <label for="yourname">이름</label> 
      <input type="text" name="yourname" id="yourname" />
   </p>
   <p>
      <label for="email">이메일</label> 
      <input type="text" name="email" id="email" />
   </p>

</fieldset>

<fieldset>	 
   <legend>성별</legend> 
   <p>
      남자 <input type="radio" name="sex" value="male" /> 
      여자 <input type="radio" name="sex" value="female" />
   </p>
</fieldset>