新世紀いじってプリンセスNEXT4～超（スーパー）メイドマリー推参!?～

80% of the Supple Castle has been already reconstructed. However, Lina, Sin's personal maid, gets extremely busy as the custle gets bigger. Sin tries to hire one more maid, but Lina strongly refuses it. One day, a maid called Marie suddenly comes to the Supple Castle. Sin decides to hire her temporarily, but Lina says, "No way! I'm one and only maid who takes care of Sin!" Well, Marie and Lina's fierce battle breaks out now....

[From ErogeShop.com]