Additional R-18 stories from the "Bocchi Kaibutsu to Moumoku Shoujo" series. Includes revised versions of their first-night story "Bougainvilla no Saku Yoru ni", the story of Heath in heat "Hyacinth wa Ai Shi Au", a new story "Suimen ni Koreopushisu wo Ukabe", and a story by guest author Sekihara-sensei.

(Source: Author's Pixiv, translated)