From DramaQueen:
Chapter 1-3,6
Reona is a college student, working hard at the Kaizaki family's Tokyo castle. Ruling over this castle is the young master, Kaizaki-sama. Amidst chores and strict obedience, who would have thought that Kaizaki-sama's discipline of Reona would lead to a fairytale romance?!
4) A Yokohama Story
5) Killing Me Tenderly
6) Rena And Danna-sama's "Loving" Lifestyle
& Rambling's From The Life Of Yuzuha Ougi