<Context>

Your aunt is manager of dorm house near Saint University. Because of old age and accident, you aunt was forced to stay hospital for whole year. Seeing you still unemployed, your aunt asking you to take her position and employ you as dorm manager. Little did you know that the dorm is stayed by three sisters...

<Characters>

1. Shiraishi Nana
   
   
   21 Years old, Air head, E cup, Eldest Sister.
   

2. Shiraishi Rena
   
   
   20 Years old, Tsundere, D cup, Middle Sister
   

3. Shiraishi Mina
   
   
   19 Years old, Introverted, B cup, Youngest Sister.