A chance meeting on a train to Tokyo sends two girls named Nana on a collision course with destiny!Ever since she got engaged to Takumi and moved out of apartment 707, Hachi has felt like she''s slipping out of Nana''s life. When the tabloids start digging up Nana''s troubled family history, Hachi tries to step in and take care of things. But the price for bringing down Blast keeps going up. Will Hachi''s good intentions just make things worse?!Ever since she got engaged to Takumi and moved out of apartment 707, Hachi has felt like she''s slipping out of Nana''s life. When the tabloids start digging up Nana''s troubled family history, Hachi tries to step in and take care of things. But the price for bringing down Blast keeps going up. Will Hachi''s good intentions just make things worse?!