Yuirineun Gongwon Hwajangsireseo

While on a leave of absence from university, 23-year-old Yu Irin has a very special and secret hobby. She enjoys pleasuring herself in the rarely visited public restroom of a park at the base of a mountain near her neighborhood.

One day, while indulging in her usual routine, she leaves a small note on a whim. The next day, someone has written a reply underneath it...

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