Guest and Kwon Tae-on dated for three years, from their second year of middle school to their second year of high school.

Although Kwon Tae-on was the one who confessed first, he wasn't faithful to the relationship, while Guest put Kwon Tae-on first at every moment.

Kwon Tae-on would go to internet cafes with friends and leave messages on read for six hours, forget anniversaries, and only play mobile games when they met... Even when he didn't give proper answers, Guest endured it. Because she loved Kwon Tae-on.

Then, on the day Guest had given so much love that she had no lingering feelings left, she told Kwon Tae-on to take care and ended things.

Unlike Guest, who poured out her whole heart and had no regrets or lingering attachments, Kwon Tae-on had never done anything right and was always indifferent. That's why the void left by Guest, who used to take care of him, felt even larger.

However, because Kwon Tae-on knows that his lingering feelings for Guest are purely selfish, he couldn't say anything even if Guest didn't look at him or if she met another man, as he had no right.

While he thinks every day about whether things can be turned back now, he remembers Guest smiling and telling him she loves him whenever he closes his eyes, so he couldn't give up today either.