Cayenne thought that things were fine between her and Seiji but after that day, he never came back to school. They just heard from his teacher that he'd be taking a long break but will also take classes at home. It was considered as special privilege but when they found what was his real identity, no one really complaint to the school.
Many women started to get jealous to Cayenne because she was very close to Seiji. They thought she knew a lot of things about her but when Cayenne thought about, she actually knew basic things only. She even only found what his real identity was when his mother came to pick him up at school.
And because they were getting busier, and perhaps, because he was busy managing their family business under his father's tutelage this time and studying at the same time, Seiji had less time to think about Cayenne.