To be honest, this is a pretty good game and i enjoyed it a lot.
Story: Really line near, no plot twist or anything. Your mission is to get to the tower, go through it in order to find a cure for your little sister who is badly sick. In my opinion, the story in this game is pretty decent if not to say that it's just like other MRPGs.
Gameplay: Pretty fun actually. Most monsters in this game can be easily killed without using much effort. At least the monsters are easy to kill because you'll have to go around in this game to solve the puzzle. All the boss fight will have a defeat scene. However, unlike other games, you will respawn right in front of the boss room with full HP, so... no more wasting time going back from the start.
H-Scene: This is a shining point of this game because despite the normal story line and decent gameplay, the H-scenes and corruption mechanic are really good. Depend on time (day/night) and your level of lewd, the H-scenes might change and it makes the game really interesting. Because of some scenes are night exclusive so try to pay attention to time in this game. A little note is that most of the scenes in this game is about tentacle... so if you have this fetish, you might really enjoy this game.
Overall, this is a pretty decent game and if you're looking a game to kill your time,... this is for you. Although all the gameplay, Story or H-scenes aren't at the top, this game is still enjoyable in its own way. Remember that most of the scenes are tentacle so if you're not into this thing, this game might not be for you. Why don't you give it a try.
HAVE A NICE DAY