Kon'yaku Haki Sareta Goreijou wa, Kyou mo Ouji o Tou no Ue kara Tsukiotosu/ First Page of Love

Otome game by Dearead avaliable in the Otome Games Romance Box app.

A noble countess just got called off her engagement, and nothing could have made her happier! She just wants to live surrounded by the books she adores so much but... certain men start to approach her! It seems like she won't be able to escape from love's grasp that easily...