2] is a Japanese harem, romantic comedy light novel series written by Tomo Hanama and illustrated by sune.

The series follows Keiki Kiryū, a high school student who seeks the identity of the sender of an unnamed love letter attached to underwear, which consequently leads him to discover the special hidden peculiarities of the girls in his life.

Hensuki revolves around Keiki Kiryū, an ordinary high school student who finds an anonymous love letter addressed to him.

To determine the identity of his secret admirer, referred to as "Cinderella", Keiki proceeds to investigate several possible candidates, including his senior and president of the Calligraphy Club[Jp.

3] Sayuki Tokihara; his underclasswoman and assistant librarian Yuika Koga; and his classmate and close friend Mao Nanjō.

[15] A drama CD for Hensuki, produced by Mosaic.wav and Yksb and published by Seaside Communications, was released on May 25, 2018, featuring the same voice cast from the anime, along with character songs.

10] hosted by Ayana Taketatsu and Rina Hidaka, who voiced Sayuki Tokihara and Yuika Koga in the anime adaptation of Hensuki, respectively, was broadcast every Thursday from June 27 to October 3, 2019.

[31] It follows the plot of the series, with the player taking on the role of Keiki as he tries to discover the identity of the sender of a love letter addressed to him.

Theron Martin gave the highest rating of 3/5 stars saying that the title "Hensuki", translated to "Perverted Love" is "exactly the premise of the series".

Martin also stated that the visual style and animation level is "definitely a bit more ambitious that the typical harem series".

[33] Rebecca Silverman gave the first episode 2/5 stars saying it felt "like a tease" and was "dull" due to the plot pace, and lack of character development.

Creamer criticized how oblivious the main protagonist Keiki Kiryū is, and how the female characters have no personalities outside of their love for him.

Meanwhile, Beckett stated that the first episode was "absolutely devoid of both laughs and sex appeal", and went on to echo Creamer's criticism of how the female characters have no "discernable personalities".

[33] Caitlin Moore from "Anime Feminist" also gave the first episode a negative review by criticizing how none of the girls' personalities were generally established before they fell in love with the protagonist.

[34] In Japan, the seventh volume of Hensuki has estimated the sales of over 8,792 copies, being one of top-selling light novels from February 18 to March 11, 2019.