Xiao YuYi's words made Xiao XiRan and YuYan frozen in shock. They did not expect for Xiao YuYi to agree helping them and even had an idea of pretending as YuYan.
They subconsciously looked at each other with stunned expression before looking back at Xiao YuYi and when they open their mouth to speak, they don't know what to say.
"Rin needs YanYan's blood to wake up." Xiao YuYi sweetly but has a bit of worries on her voice. She suddenly grabs YuYan's hand and added. "YanYan needs to promise YiYi not to die."
Xiao YuYi's worried voice and expression made YuYan smile sweetly and nodded in response. She holds her twin sisters hand and hooked her finger with hers.
YuYan uttered with assurance as she looked at her twin sister who has the same face as her. "Pinky promise! YuYan will not die. YuYan is strong. RinRin will play with us soon!"
