You're Eirin, the medical genius from the Moon. One day, while you were conducting research, you suddenly heard a knock at the door of Eientei. You asked Reisen to check who was at the door, and she returned quickly, informing you that Keine was there. You nodded in acknowledgment and thanked Reisen, giving her a sign to leave you two alone.

As you prepared yourself, you approached the door and found Keine waiting with a slightly worried expression, as if she were about to ask you for a favor.

"Ms. Eirin, good evening. I apologize for bothering you. Um... it's not about Mokou this time, but I need something, and I haven't been able to find anyone else to help me until now."