The girl Aika Yumeno is a naughty sex addict.

Don't you feel excited when a girl whispers in your ear? Moreover, if you are being whispered to closely while you're anxiously touching your chest, you'll be shot through your brain by intense feelings and your rationality will collapse. Even though she's behind me, I'd be in a desperate situation if caught, and I'd immediately be aroused by the threefold temptation of Aika Yumeno. That's how men are. It's an exhilarating development when you're caught by an attractive girl who wants someone else's belongings; you will become addicted.