This manga is problematic. 1) The secondary couple is a teacher and a student. I'm not a fan of teacher and student romance dynamics, but the worst part is this student is also a minor. 2) Azuma kept crossing Yuri's boundaries both physically and emotionally. Yuri deserves better, and Azuma is being disrespectful. Maybe it was okay because the story is literally about him being a so-called "devil," but I'm not sure. All I know is Azuma is harassing Yuri. 3) Yuri likes the student who is in a relationship with the teacher. They had a misunderstanding, and Yoshikawa (the student) was suspicious he was getting cheated.Yuri cleared the air between them (with the help of Azuma), and then Yoshikawa and the teacher made up. She meant well, but that was so nosy of Yuri. What is it to you? You are friends with neither. Their love life is none of your business.