Based on erotic game by Blue Gale.
Airi can't stand her father, Atsuki. When she hears that Marina won't be able to join them for the family trip and will have to come a couple days later, she is more than just upset. Atsuki on the other hand uses the opportunity to drug and rape his daughter. This makes Airi worry that her father only likes her when drugged. Will he be able to convince her his love is not dependent on any tinctures and thus bridge their relationship?
