If this is a specific indie game, a book title, or a localized project, providing more details about the platform (e.g., PC, mobile, itch.io) or the author/developer would be helpful.
Because "RJ" numbers generally correspond to Japanese doujin (self-published) audio or art works, "Eng Kana" likely refers to an English translation (Eng) of a work featuring a character named Content Overview eng kana saw a lovely jungle mushroom rj14
While the exact "story" of the jungle mushroom may be unique to a specific piece of media, If this is a specific indie game, a
"eng kana saw a lovely jungle mushroom rj14" a book title