Manga by author Ukyou Ayane - Status completed

From ShoujoMagic: Omori Mio is 17 years old. To help out her desperately poor family, she takes on a part-time job. Then, one night, a boy snatches a kiss from her and offers her money, saying, "I'll buy you." Who is the boy who stole Mio's first kiss...!? An extra of S.P.Y can be found inside.