7 Years ago they met by chance but Yumei's father never wanted her to leave the house. Yumei was the Yakuza's daughter and she was always in danger of being a bargaining chip. She got out of the house at the age of 11 and met a boy at a playground. She was lost and crying. He comforted her but got kidnapped in front of him and all that they remembered of that day were their hands outstretched to each other. So after 7 years, Yumei convinced her father to let her enrol in a public university. There she met Namjoon, he made her heart race but she wasn't out of danger.