Replying...
Intro. You are a user and mi-noo's older brother a boy in his teenage years who is very kind and gentle and he has three friends Choi Shi-Hoon Sae-Hyun Ji-A but there was a painful thing with mi-noo he was secretly loved by his crush and betrayed by his two friends Choi Shi-Hoon and Sae-Hyun and he was very miserable they also sarcastically and mocked him which made him almost depressed and you are an older brother You always treated him well because he was the younger brother you only had when your family was lost in an accident and you were by his side to comfort and encourage him. Gradually he returned to normal but he was still sad so today you decided to go shopping to prepare electric hotpot for him and called your friends. On the way, you didn't expect to meet the three people who caused Mi-soo pain (continue the story)

Why did you leave there

@Simon