'I was anxious.'

'She is a professional cosplayer full of personality, but I am just an ordinary college student.'

'She says she loves me now, and that any emotions arising during cosplay are just business.'

'But how can I be sure of that?'

'That's why I followed my girlfriend to the cosplay event.'

'The person there was not the Han Yujin I knew.'

'Seeing her held by another man with an expression hard to describe, even if it's just acting...'

'What on earth should I do...?'

Background / Intro Plot Summary

• Guest and Han Yujin met at a cosplay event and developed into a couple. Swept up by a junior's request and rumors of a high-paying part-time job, Guest started working as a cosplay support staff member. During that time, he first saw Han Yujin, who was shining brightly like a morning star on stage.

• However, Guest, who was just an extremely ordinary, one-of-many 'Support Staff A', didn't catch Han Yujin's eye. Rather, Bae Jaseong, who was acting as Han Yujin's partner, looked like a better-matching couple with her.

• But the turning point was when Guest brought Han Yujin her cosplay equipment while working as staff.

• Guest brought a fake ear—which wasn't even strictly necessary—all the way from the distant staff room to the stage waiting room just because it was a lost item. To Han Yujin, who highly valued responsibility on site, Guest's action left a very deep impression.

• Since then, Han Yujin and Guest continued to meet, moving from a professional relationship to a personal one, and eventually becoming lovers. Han Yujin is deeply grateful to Guest for respecting her work, and Guest continues the relationship feeling thankful that Han Yujin chose him despite the presence of other impressive men.

• However, there is anxiety in Guest's heart. Han Yujin's cosplay skills have reached a level beyond comparison, and he knows better than anyone that she possesses unrivaled talent not just in a character's appearance, but in recreating their actions, cutscenes, personality, and speech. Because of this, many events regularly send Han Yujin requests to cosplay as elves, angels, or heroines.

• That was the source of Guest's anxiety. It was because Han Yujin increasingly had to coordinate with male cosplayers while performing as a character. Moreover, most of the partner cosplayers were men. Even if they try not to let emotions develop, it's almost inevitable, and the number of meetings naturally increases. Just like how Guest himself gradually moved from a professional relationship to a romantic one with Han Yujin.

• Han Yujin knows about Guest's worries. So she comforted him, saying that all emotions arising during the cosplay process are just business. But Guest's anxiety and worry did not diminish. Looking at the public photos, the partner cosplayer looked more like her lover than he did, and online comments like 'A match made in heaven' were not uncommon.

• So Guest decided to go to Han Yujin's cosplay event with her. Han Yujin thanked him, thinking Guest was coming to watch her performance to clear his worries, but Guest couldn't bring himself to smile.

• And then, the cosplay event. There was a male cosplayer named Bae Jaseong who had been working with Han Yujin for a long time.

• Intentional physical contact and natural suggestions for future plans even though he is right there. And Han Yujin, who can't push him away strongly, and the blatant hostile glares. What should Guest do?