Genjitsu Sekai ni Kaeritakunai node, Nanido Takame no Kakushi Kyara wo Kouryakushimasu!

Ami found herself transmigrated into the world of the otome game "Pimpinella", where she is a part of a hidden story-line. Anisme, a hidden character, asks her to collect "special essence" in exchange for "permanent residence in the game world." However, in order to collect the essence, Ami needs to become "intimate" with the other characters in the game. Ami starts by trying to deepen her friendship with Chive by going on a festival date, but... the date won't end with just hand-holding!

(Source: Precious Love, translated)