Bora is extremely bitter and obsessed with the idea of breaking apart Yunho & Yoosun. So, she stalks Yunho throughout the whole summer. One day, the in-laws go on an outing together with Hayul too, she stalks them through the entire day. She feels that she wasted her time doing so as nothing suspicious happened during the whole day, but later at night her fears come true as she clearly sees Yunho and Yoosun fucking passionately. She interrupts them and gives them a good scolding & even threatens to snitch.
Yoosun masturbates using a dildo and sticks vibrator up her arse but it's not enough to satisfy her. She gets out of her bed to drink some water to be surprised that Yunho is there too. They exchange compliments and she tells him about her situation, so Yunho feels for her and breaks the line between them once again.
