The letter does not include the sender’s name — but the letter does include white panties.
The manga launched in Hakusensha’s Harem magazine in 2019, and Hakusensha published the manga’s one compiled book volume on April 24.
Kadokawa will publish the manga’s sixth and final compiled book volume on February 9.
Kanbe is also drawing a separate manga titled Kawaikereba Hentai demo Suki ni Natte Kuremasuka? Abnormal Harem that focuses on what-if scenarios for the story.