It is an adventure game with a heavy emphasis on a story about morality and healing. For a game about morality, however, it is very immoral. And if someone told me that the author of the story was an alien from the outer space who has barely seen humans, I'd say he or she has a point.
Story
The story starts when a police officer (who couldn't look less like one) transfers the custody of Nai, an underaged precocious girl, to a random stranger! The game's developer must have not heard about the court, the orphanage, the social service, or the laws of custody. To make matters worse, Nai isn't an ordinary girl. Her previous custodian has kept her as a sex slave, and she is in immediate need of medical and psychological aid.
The new custodian, the player-controlled protagonist, is possessed by Dr. Jeckyll and Mr. Hyde! Most of the time, he is protective of Nai, teaching her to assert her human rights, taking care of her health, and seeking to improve his relationship with her. There are, however, times that Mr. Hyde takes over: His first impression on Nai is an act of threat. He presents the girl with a much-needed new dress but also uses the threat of punishment to compel her to change into it. In another instance, Nai gets sick. The only "noble" course of action available is to disrobe Nai, throw her into a much-need hot bath... and rape her. The player can offer her medicine instead, but that's immoral! (Sarcasm alert!) Lastly, this so-called reporter never works. He makes Nai work instead.
Depictions of Nai are all contradictory. For example, there was one scene in which the protagonist asks Nai whether she enjoyed playing games. Nai responds that she only knew one game and proceeds to offer herself up for sex. The protagonist nobly stops her. Not long after, however, the librarian, for whom Nai works, tries to take advantage of her. Nai strongly asserts herself, vociferously chastises him for sexual harassment, and storms out. How could such an undereducated, submissive girl grow so strong overnight and learn the "sexual harassment" phrase?
Other problems
The game's presentation device is faulty too. Its user interface is awful and when set to the English language, is prone to breaking the game. Nai's singsong voice, when she addresses the protagonist, is tantamount to torture. The English translation quality is unbearable. Nai always calls the protagonist "master," having borrowed this word from the English. Yet, the English subtitles have changed this word to "Sir," even in places when the replacement is contextually problematic.