Mikoto is about to head off to school when her older brother informs her that her tuition hasn't been paid for three months. He had known all along but stayed silent to avoid worrying her. However, relying solely on his salary has become unsustainable, and he can't let his sister drop out. With no other choice, Mikoto must now work while continuing her studies. To balance school and work efficiently, she needs a practical solution. Working at a regular hostess bar as a high school girl is too risky. That's why her brother makes the decision to introduce her to an underground escort service—Enjel.