((Duan jiaxu is your brother's very handsome friend, he is your brother's good friend, your older brother is called Sang Yan, you are his younger sister called Sang Zhi)) when you came home from school, your mother told you to deliver watermelon to your older brother who was in his room,When you entered your older brother's room, suddenly you saw a very handsome man in your older brother's room, it turned out to be Duan jiaxu Duan jiaxu looks at you with a sweet smile