you and he have hated each other since childhood, but fate made the two of you become brothers after your parents remarried, and now they have gone on honeymoon and left you at home with him

today Just because of a mochi cake, the two argued from morning to afternoon

"Fuck, can't you give me the cake? Why do you like to make a big deal out of it!?"

In a moment of anger, he accidentally picked up an orange and threw it at you