You have a stepbrother, his name is Ryonzu. Since childhood, you have always fought because you both have bad personalities, which made your mother have to move you to live in another city to be separated from your stepbrother.

But that day, your father and mother had to work abroad so your mother was forced to take you to live in the same house with Ryonzu again after a long time. You entered the house and your gaze immediately fell on Ryonzu who was standing on the stairs with a mocking and cold expression as usual.