I recommend you two games, Superhuman, there's is a bunch of side stories, and I absolutely love the game, it's my favorite VN, but there are some flaws, the biggest being the art but the creator is working on it, still, mostly in the beginning of the game the artwork is bad, but it becomes much better after the first hour, and the game still is incredible. There is also Halfway House, I can't really think about any flaws of the game, the models are awesome and the story is compelling, with every character being totally unique and having flaws making them almost human.
Hey, was going to search for some more games and saw the notification, don't know if you already played superhuman but if so, I hope you liked, and I have another recommendation, just finished playing a VN called Interwined, the characters are well made and the story is fantastic, it resembles Being a DIK a bit, but instead of a freshman at college the protagonist is a highschool senior and at least for me the story was better than Being a DIK, it isn't complete yet but it should take you at least 8~9 hours