Afa and  Alois, a lovely siblings before being the princess and prince of certain Kingdom, both destined to be its symbol in the future.

Afa has a secret, she is in love with his brother but don't know how to make his brother notice her feelings for him, Rihiteri, the Queen and stepmother of Afa and Alois talks woman to woman to Afa and motivates her to express his love to her brother.  That night Afa sneaks in her brother's room and gives him mouth to mouth a potion that her stepmother gave her so she could express her love to her brother...they make love and the prince confess he is also in love with Afa.

However Rihiteri is actually a witch and her true intention is to destroy them so they cannot inherit the throne...

Samayou Midara na Lunatics Vol. 1  RAW

The step mother succeeds in sweet-talking Princess Afa, who is the main character's little sister. With her, Afa attacks the main character like naughty prostitutes. Both of them are sexually exited and reach ecstasy a number of times.

The main character receives naughty assaults from his horny step-mother and his naughty sister!

Samayou Midara na Lunatics Vol. 2  RAW