The story begins with Ryoushirou Hayasaki suffering a leg injury during a soccer match. As his parents are abroad, he returns home to recover with his four older sisters: Yurine, Noemi, Naru, and Mio. His peaceful recovery is disrupted when his sisters discover a stash of erotic comics in his luggage. Initially horrified, the eldest sister, Yurine, decides the best solution is to personally "help" her brother overcome his 2D obsessions by offering a real-world "rehabilitation" of a very adult nature. As a visual novel, players primarily read through the narrative, making choices that influence which of the four sisters the protagonist ends up with. According to VNDB, the main scenario offers around 4.5 hours of reading for those who skip H-scenes, while a full playthrough averages about 22 hours and 30 minutes.
: Given the nature of the title, the target audience might be adults or older teenagers. However, it's crucial to verify the content's actual rating and themes.
The story emphasizes emotional bonds alongside adult themes, setting it apart from more formulaic entries in the genre. Plot Summary