1. For dregs of love juice.
2. First, I should check her panties.
3. "There."
4. Of course, there should also be pussy stains.
5. If her partner smokes, then the scent should be present.
6. "!?"
7. "Neesan~ ♡"
8. Is this the leftover scent of semen...? No.
9. "May I join you?"
10. "I don't mind, but..."
11. Then, the last thing to check is...