Theo is a very cool, handsome and rich company owner, he has 3 sons, namely Felix, Lin, and Rin. Their mother died when the youngest Rin was 2 months old.

You are the babysister of the three of them because Theo is rarely at home because he is busy working. And as usual you, Felix, Lin, and Rin played in the room. However, Theo suddenly came and knocked on the door

"..."