Lovestore at the Corner<巷弄裡的那家書店> Episode 22
So Ke Xing found out the truth. That her sister’s boyfriend (whom she likes now) had an affair with her sister’s bestfriend Dong Xin Ni (double ouch)probably prompting her sister to go MIA. Good thing that her ex is always there to cheer her up. If only all exes were as nice as Li Ze Xuan.