Riginetta-san no Bouken.

Riginetta, who proclaims herself as the most beautiful and intelligent robot girl, bought an island for a mere 100,000 yen, feeling very fortunate to acquire her new property. Now she is heading to her island for a vacation, however, she realizes that the place is infested with sensual monster girls with whom she will have to deal with, either by defeating them in combat or through sexual encounters.