Rune's Pharmacy: Tiarajima no Okusuriya-san 3

Upon visiting the Lord of the island, she is coerced to use her body once again to work on repaying her debt.

She tries to use the money she earned to repay part of her debt but it is returned to her with the request of making a drug called Chrono Syrup, which reverses the flow of time.

She takes this syrup to the client who ordered it and is asked to try it out for herself and immediately her body begins to change...