, or , is a Japanese light novel series written by Riku Misora and illustrated by Saba Mizore. SB Creative published the series in four volumes from April 2020 to September 2022. A manga adaptation, illustrated by Kakito Kato, began serialization on the Manga UP! website in May 2022. As of December 2025, the manga's individual chapters have been collected into three volumes.
Plot
Media Light novel Written by Riku Misora and illustrated by Saba Mizore, the series began publication under SB Creative's GA Bunko light novel imprint on April 14, 2020. The series was completed in its fourth volume, which released on September 14, 2022.
Tentai Books published the first volume of the series in English.
Volumes
Manga A manga adaptation, illustrated by Kakito Kato, began serialization on Square Enix's Manga UP! website on May 28, 2022. As of December 2025, the series' individual chapters have been collected into three volumes.
Volumes
Reception In the 2021 edition of the Kono Light Novel ga Sugoi! guidebook, the series ranked eighth in the bunkobon category and fifth in the new work category.
Thomas Knight of NookGaming praised the setting and contrast between the two love interests in a review of the light novel and Tentai Books stated that I Kissed My Girlfriend's Little Sister?! has sold better than any of their other titles to date in an interview.
References
External links