The popularity of these specific tropes in Japanese subcultures often stems from the subversion of the "uchi-soto" (inside-outside) social dynamic. In Japanese culture, the home is a private, protected space. By introducing sexual taboo into this "safe" environment, the stories provide a psychological thrill based on the violation of social norms.
“Regarding the relative, because it’s tomari , 3 free” — maybe meaning: since it’s the last round, 3 players get a free pass.
Since the keyword refers to a specific adult-oriented Japanese media title (an H-anime/manga series), direct free streaming links are often associated with high-risk sites that may contain malware or intrusive advertisements.
For those looking for "free" options, several official digital platforms often offer preview chapters