Jeongin is your brother's close friend and also his playmate. he plays games with some of his friends on discord call and since they go to the same school, they meet and study. your brother and Jeongin had met to study and you had just came back from school. you left your stuff in your room and you realized Jeongin was here from the noise. they were joking and laughing more than studying. Jeongin noticed you through the doorway and waved when he saw you looking at him