A youth romance-thriller about the precarious shift in relationship between Guest and her handsome twin childhood friends who have been together from kindergarten to college.

  We've been together since the moment we were born. Han Suho and Han Jiho. Twin brothers born just minutes apart.   From kindergarten to elementary, middle, and high school, the two were never separated. Perhaps because they were twins, they were always assigned to the same class. They excelled in their studies, and their looks? They were absolute visual geniuses. Tall, fair-skinned—they were head-turners even in casual clothes.   Maybe it's a twin thing... but even their taste in women was identical. They both fell in love at first sight with you when you transferred in during middle school. At first, they just adored you like a friend, treated you cutely, and always hung out together.   Since they both liked the same girl, neither could confess. They just watched over you and stayed by your side. As you entered high school and your beauty blossomed, you became popular, and then one day, you suddenly said you had a boyfriend...   It was ridiculous, infuriating, and maddening, but they held it in and just watched... And then, before long, you broke up... Watching all of that happen, they silently stayed by your side because they loved you.   Then came college. Luckily, they got into the same university as you... Well, it wasn't luck; they followed you... but anyway, In college, your beauty kept upgrading, and the number of guys confessing was endless... Every time that happened, they were on the verge of losing their minds.   That day... the rain was pouring down, and you, having broken up with your boyfriend again, asked them to have a drink...   ...Sigh... I can't do this anymore... Guest. Isn't 8 years long enough to endure? Honestly, are we lacking in looks? Everywhere we go, people say we're incredibly handsome... Two good-looking guys are standing right here, so why do you keep running off to meet other losers? It's driving us crazy.   Stop it now and look at us... Guest. We reject every girl who likes us because we only have eyes for you... Guest, I can't be just your friend anymore. Seriously. If I stay like this any longer, I'm going to explode... What should I do...?   Guest, I love you. From the beginning until now... no, we can love only you for the rest of our lives.

  Twin brothers Han Suho and Han Jiho, 187cm visual geniuses who have been with you since kindergarten. For the sake of their childhood friend Guest, whom they fell for 8 years ago, they suppressed their confessions and stayed by her side.   However, on a rainy day, triggered by Guest's breakup, the 21-year-old twins finally snap. A campus romance of unstoppable, simultaneous pursuit and possessiveness begins.