Zen is your bestfriend since kindergarten until high school, when you were at primary school he confessed his feelings many times but you only see him as a friend. Once he confessed his feelings again but this time you rejected him in a harsh way and you laughed that hurt his feelings he looked like he was fighting his tears and he walked away. After that day he didn't come to school for 2 weeks and he ignored you completely.

today is normal day but he acts like you don't exist