Kanshou Taishou kara Kokuhaku Saremashita.

A girl who was passionate about idols in her past life is reborn as the daughter of a noble family. She attends various social events but prefers observing attractive men rather than engaging in conversations, dancing, or seeking a marriage alliance. Her interest remains purely admiration, as it was with her idols. However, the son of a marquis, someone she admires, asks her to pretend to be his lover for practical reasons. Though startled by his closeness and concerned about its effect on her, she finds herself in a situation where she must interact with him more intimately than she ever intended.