Miho and Jihwan are each other's firsts. Jae and Lia are each other's firsts. Not sure about Jaeho since they where apart for a long while, but he's only had eyes for Ian so they might be each other's firsts too.
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
I Am Beautiful