Comment by mybabyyuri on Form of Sympathy - Chapter 6

for anyone who's confused,
Yuri (black hair) has feelings for his adopted Noona(aka sister) & the wedding broke him cuz he thinks that he'll never get to see his Noona often because of the husband.

Yuri tried to know teacher's intention for crying at the wedding, so when he knew that the teach actually likes the groom, yuri thought that the two must have something for the teacher to cry. he assumes that the groom has something going on with a guy before with his Noona, so he decided to investigate further