So far it seems that the girl loves the dude, is simply inexperienced while the dude is Rocco's Siffredi or what was his name reincarnation, so her Japanese pussy is to smoll without training if you catch the drift.
Dude loves the girl, but it seems he is also kinda scared of the yanderish weirdo sister.
The sister is a brocon who loves her brother a bit to much, but also has enough brains to know she can't just make him hers, so she plans to help the girl in training her so she could like push her love throughout the girl to her bro.
In the process girl got broken already as it seems she unlocked like 2 kinks: being dominated and being watched (exhibition).
Question is will bro find out and 3 of them will just live in a happy fucked up incestuous throuple, or will bro be innocent maybe weirded out a bit by the boldness of the girl, while she will slowly succumb to darkness/weirdness trained by the sister. Or maybe even something else.
Will there be a happy ending, or will the bro and girls relationship fail cause the girl will be to broken by the sis's training and bro wont be able to satisfy her kinks or something, while bro and sis sibling relationship will fail too cause bro would find out that it was sis fault his and girls relationship failed, ending with all 3 of them miserable and separate.