What is Tanpo? Basically it means security collateral. In this story, the Suzumiya family have run deep in dept that they pawn off their three... more>> daughters Yukari, Ai, and Midori as guarantees for the money they'll receive. Well, they mistake some piece of trash called Ishihara Yuujirou for the Daikoudan Group. Unfortunately, Ai-chan is the one that the rest of the family/staff coerce into tempting Yuujirou with her body to initiate sex with her in order to secure money for the debts. <<less