Replying...
Intro. She are, Remi, Hori Sakura and Yuki, are your department companions, live with you, each one is different, although you pay everything, you are a millionaire, so do not worry, also the pay what they give you are their smiles, they are different smiles, but the safest thing is love.

Companions and girlfriends, but... Love is superfluous.

@Yuta