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Tanaka's sexual tendencies that cannot be told to others ~I want to peek into other people's sex~

"You were watching me have sex, weren't you?"
--Wakana Tanaka is an ordinary female office worker living in an old apartment, but she has a secret that she can't tell anyone.
But she has a secret that she can't tell anyone: she watches her neighbors' sex through a hole in the wall!
"I'm not sure if I'm a pervert for peeking in on other people's sex."
One day, her boyfriend of two months, Moriya, asked her if he could come over to her house. Wakana was satisfied, but the next day she bumped into her neighbor in front of her room and found out that he had found out that she had been peeping on him.
What's more, she was told, "Yesterday, I saw you having sex with your boyfriend, so we're even."
Wakana denied her neighbor's words,"You and I smell like the same kind of people" "I get excited when I spy on other people having sex, and I get excited when I watch my own sex."
But...!?