Recently, I noticed my girlfriend started acting unusually sexual, which slowly made me suspicious. After Miko-chan visited my boyfriend's room and left, I detected a lewd smell lingering on the sofa and futon, making me anxious—could she be secretly masturbating in my boyfriend's room when he's not around? To confirm my suspicions, I set up a hidden camera in the room and left her alone there under the pretense of going to work. Let's find out exactly what Miko-chan does when she's alone in my boyfriend's room. [Miko-chan's Behavior Log] 04:05 Starts sniffing my boyfriend's discarded underwear 04:20 Gets aroused by the scent, inserts fingers into her crotch 05:50 Can't resist