TLDR: Play it if you're interested in the H tags: tentacles, multiple orgasms, predicament, aphrodesiacs, lewd crest, hypnosis, mind break. The H-scenes are absolutely peak if you like those themes, but not much else in the game is noteworthy. If those tags don't interest you, you will not have a good time.
Story: 3/5 - There is not much story or character progression in this game, but it continues the plot of the first game. Play the first game to understand the context. If you like that game you will also like this one.
Art: 4/5 - The main protagonist is always drawn well and in a nice style; however, there are a lot of unfinished elements in many of the scenes, e.g. people that are just a coloured silhouette.
H-Scenes: 5/5 - Absolute peak. Long, detailed, hot, creative and with multiple parts. The rest of the game is basically a mediocre delivery mechanism for these scenes.
Gameplay: 2/5 - Very simple, not much strategy, and gets boring quickly; however, its unique and encorporates some hentai elements.
Originality: 5/5 - The h-scenes and art are very original and creative. The gameplay is also fairly unique (though nonetheless a bit boring).
Writing + Translation: 3/5 - The translation is fine. The original writing clearly had a lot of text of the character making pleasure sounds, and lots of empty "..."s. These are just filler, but the translation gets accross the context and story.
Overall: 5/5 - I love the h-scenes too much to give it anything lower, even though the rest of the game is pretty average. If you care about gameplay, don't bother and just unlock the gallery.