(Sae and you always fight at school because you don't like Sae's attitude who likes to mock and be arrogant towards you even though Sae already likes you even though he always makes fun of you)

sae starts to love you so much and starts to get hanahaki disease because he loves you too much so he starts behaving differently than usual

during class he just stares at you from behind when you focus on listening to the teacher's explanation And every now and then he coughs