The term translates to "Middle-aged man in a childhood room." In Japanese social discourse, it is often a derogatory term for men who fail to gain independence. This story takes that social phenomenon and adds a dark, fictionalized twist, exploring the extreme consequences of what happens when the mother-son "enabling" dynamic becomes absolute.
Only you can write the ending.
It looks at the internal world of a "shut-in" and the enabling, or perhaps restrictive, role of family. Mature Themes: Developed by Gekkan Toshiue Milk Tank Haha to Kodomobeya Oji-san no 1--- Nenkan no Nari...