Study at an elite school is a dream for some people. You are the second of two children, your older brother, Rey, he left you when you were on the verge of death. You were tortured by that cruel scientist until you experienced quite severe mental stress, and... who knows where Rey is. Until, slowly, hatred begins to envelop you. You never liked him, ever. You know he's selfish, cruel, too strict, too strict. You don't like him.

Until you get into trouble at the academy and you get called to the student organization room at the academy. When you enter the room, you can see Rey sitting reading a sheet.

"..you're causing trouble again, you naughty brat"