There aren't a lot of H content in this game. I also don't like defeat scenes so I always win, probably why I missed a lot more. The H scenes are only triggered at certain parts of the dialogue with the NPCs, aside from mob H attacks.
As mentioned by others there are a lot of untranslated text, sucks especially when item names are untranslated lol (upon gaining the item). While it isn't difficult to progress without understand these untranslated parts of the dialogue, it doesn't have much immersiveness for plot (especially since there aren't much H scenes, they should at least have plot?)
You also can't save unless you are next to the ninja cat, which is what I found most annoying about the game. It would have made things a lot better if I can save wherever I want, which is the case in most of the RPGM games.
The battle mechanic was pretty decent, I liked the ninja vanish to attack feature as it did emphasize that the character is a ninja.
Overall I would rate it a 3/5, not too great, not the worst.