I don't remember the story, but I do remember the characters; the mc was a son/older brother, the mother, the sister, and the sister's best friend. There was a lock picking system and a level up system where you solve jigsaw puzzles and they progressively get harder the higher level you want to level up. There's one part of the game where you play strip spin the bottle with the little sister and her friend. You can also walk in and do lewd things to the sister. You also get emails with the father, but he isn't actually there in person. You can also spank the sister if she pees the bed.