Agreement With My StepBro

As the only son, Justine puts so much pressure on himself and set standards that is so high. He wants to be perfect and successful in the future, not only in terms of business, but also if he will have a family. He have two older sisters that were now in a stable life and married which made him feel more pressure. But, he knows he can not do that. He definitely doubt himself. He is known by all as a silent, intelligent and shy guy which makes him safe about his real identity. His real self, the genuine he. Every night he locks himself on his room not to cry, but to deal with his stress and struggles by watching his idol. One day, his world and life suddenly changed when his father introduced a woman which will be his stepmother. His stepmother, Laura, also now only living with her youngest son as her older daughter's and son's job were about travelling. As the time goes by, Justine accidentally found out the dirty little secret of his stepbrother, Joshua, which also revealed his. By that, they got an agreement which is a complete disaster for Justine. How can they handle each other? What will be the life of Justine now that he has an agreement with Joshua? How and when it will end?