NOSATSU JUNKIE GN VOL 1,2,6 Manga (3 Books) 
Umi, determined to have Naka, takes Naka's mother's suggestion and takes Naka out for New Years Eve. But, Naka gets sick and while Umi's trying to help, Naka's phone rings. Umi goes to answer it and finds the envelope with the information for the Heki job in her bag. As the two of them are yelling at each other for never telling each other, Naka almost tells Umi that she likes him, but Umi doesn't want to hear it yet, and kisses her!