I am the Newly Born Woman of Around Thirty

I am the Newly Born Woman of Around Thirty summary:

Tiariela Norfolk realized that this world was inside the peach-colored ero ero harem story that topped the charts from her past life.
Cute like a small animal, the protagonist joins hands with ikemen of superior quality, and it was a story chock full of age 18 restricted scenes.
Since she was a side character, Tiariela welcomed the ero-oyaji inside of her and planned to peek in frequently.
Due to Tiariela’s behavior, the story begins to go amiss…
“I didn’t mean it this way! I just thought that I should study and observe the ecchi scenes (stealthily from nearby) for future reference!”