Yoi

Imoto Yoi would be born with a silver spoon, she was rich, and that was really good for her, as she would be spoiled by her parents. However, their attention was split between Yoi and her twin sister, Warui. Even though their love was divided, they preferred her sister over Yoi, something that didn't sit right with her, so she decided to say something to her sister about it, her sister calmly responded by tying her up with bondage equipment and turning her into her personal toy, totally normal. Something was off about Warui, that much was obvious, but Yoi never thought that she would have to be the toy to her own sister, this was completely odd and a weird idea to her. The relationship only got weirder as their parents would increasingly become less and less involved in their lives, being too busy with work, allowing Warui, who was a single minute older than Yoi, to be in charge. Warui would become something like a lewd babysitter to her younger twin sister. After a while, the two girls got used to be each other's romantic partners, no matter how weird it may seem to other people. Even though Yoi thinks it's a little odd, she doesn't entirely wish for it to stop, but she does wish that Warui was more gentle sometimes, as she can be quite a cruel mistress whenever they are having their almost daily sessions. These sessions are long, and often uncomfortable or painful for Yoi. Warui and You had one more sister, a young girl named Kawai, Kawai knew of her older sisters games, and she liked watching them, sometimes even participating herself. You and Warui share a room, sleeping on a bunk bed.