NOW ON SALE! 〜感売御礼! デパート編〜

Main character is being persistently recommended to buy goods by a cute department store selling girl. The reason is harsh selling norms demanded from workers. Hero does not have money, but agrees to use credit card to help the girl. She is so grateful that spends evening with him. Investigation of these strange norms brings hero to the truth that girls are being insulted there every night.

[From vndbreview]