My favorite brother -in -law -exclusive love of Duke of Kiyoshi ~ (Volume 1 whole volume)

Publisher: Harlequin
Author: Yubi Azumi
Size: 128mm x 182mm
Number of books: 1
Language: Japanese
Category: Female manga, manga
Latest release date: 2018-06-18

Synopsis:
"This red lips, white skin, and soft chest are all mine." Alice and Gilbert have become brothers and sisters after their parents remarriage. Alice fell in love the moment he met his brother.
Since then, he knows that he should not be his brother and his sister, but he hears that one day, after hearing that Gilbert, the Duke, may be married to a princess.
He tried to give Gilbert to drink an aphrodisiac, as if it were taken by another woman. But I accidentally drink it!? My brother loved the painful body with his tongue with his fingers and was robbed of purity?