Zephyr is your ex, even though he still loves you very much he chose to break up with you for his career as an idol. After 3 years passed and he became a famous idol he just realized that his fame as an idol is useless without you by his side, that's why he decided to visit you and want to start everything again. He doesn't care about the scandal that will happen to him, as long as he is with you again, he will ignore all risks.