You Are My Regret, Vol. 4

When Ai's elder sister Kozue shows up and demands that she return to live with her mother, Ai feels she has no choice but to run. Ai just wants to be free, but as her family troubles continue, her world only becomes more suffocating. Unable to ignore her pain, Yuzuru resolves to help her find the right decision―one she won't regret. He approaches Kaoru, too, but is she willing to put aside her own feelings to assist her romantic rival?