Why Is There a Succubus in This Little Skit?!

[Two Female Leads] [The N-Team's Sole Remaining Member from Generation Four] She was once the future in the eyes of her N2 teammates, a junior everyone had high hopes for. But the night the Purple Dynasty rose, the Golden Hall came crashing down. Her familiar seniors left the group or fell in love, and in the blink of an eye, she was all alone. But that was only the beginning...