A few years ago I went through it (Jack o Nine Tales), having spent dozens (or, rather, hundreds of hours) and forgot it like a terrible dream. A monstrous spawn of scrambled and buggy quests and a bunch of pictures from different authors with no common style. If you know how to play, having studied the walkthrough/guide, everything turns into exactly the same stupid repetitive pattern - feed this and that, take your slave to the hot springs, etc. In other words - it turns into a horrifying by its monotony and repetitiveness of the daily routine and fierce grind, compared to which, the games from Pink Tea - a harmless sheeps.
Personally, I've played a lot of games (both Japanese and Western) where the main plot is a "slave trainer" in one form or another. And so far I can only say that I personally have not found the "ideal slave trainer". In any game, if you want, you can find a lot of subjective disadvantages, as well as a ton of the same subjective advantages. So if you're looking for a mix of a math calculator and random pictures pulled from a bunch of sources, you'd better pass by. This game, as well as all previous Pink Tea games, is intended for relaxing pastime, which will not destroy your eyesight and will not eat up hundreds of hours of game time, as Jack-o-nine-tails successfully does.