Based on the erotic game by Liquid.

Clause plans to reclaim his kingdom, which was once captured by the Angkatatan family from Leiye. Pretending to be Leiye-sama's companion and subordinate thus makes scenarios and dramas very good and finally Princess Leiye is framed by Clause for the purpose of revenge for the event 300 years ago. Rape all Leiye families and also want to destroy the Navy state that's the purpose of Clause.

(Source: Nekopoi and Has Been Translated)