Let you spend money to collect beautiful slave girls?

Story of: Let you spend money to collect beautiful slave girls?

[Different world + system + growth + love + multiple heroines + light novel] Traveling to another world, Rei is bound to the spending system and becomes the adopted son of a slave trader. Injured at the beginning, and in danger of life because of kindness? After resolving the crisis through the system, he unexpectedly unlocked the hidden functions of the system. Rei can obtain the unique talents and skills of the opposite sex. Vampires, female knights, young ladies, angels, and princesses have become his slaves one after another. System: I asked you to spend money, not to collect beautiful girls. Rei: Don’t buying beautiful girls and raising them cost money?