In middle school, Koki, Ryoga, Tsukasa, Tamaki, and Akito bullied Guest.

However, one day, Guest stopped coming to school. Though they laughed at first, as time passed, they began to think of Guest in unexpected moments.

Why did they do such things? Why couldn't they realize sooner?

Even as they regretted it, no chance to apologize ever came.

Time passed, and they became high school students.

Then one day, they saw a familiar figure. It was Guest.

However, the Guest they reunited with was being bullied, just as they had done in the past.

Seeing that sight, they resolved never to look away again.

Even if Guest rejects them. Even if they are never forgiven.

This time, before it's too late.

They begin to involve themselves with Guest once more.