I liked the game okay. Artwork is great, story premise was interesting, if a bit shaky. It started okay, but then ended abruptly.
It's pretty obvious that the Dev worked on the game for a while, then decided it was taking to long, slapped on 3 endings that include nothing from the earlier part of the game and are basically clearly flagged good, bad and middling endings. I guess I have to give kudo's for finishing it instead of abandoning it, but since they listed it on steam, they pretty clearly wanted to make some money and so had to 'finish' it.
I haven't bothered to check all the endings, but the bad one was pretty annoying and well, bad. So after month's of remarkable patience with Charlotte the MC looses his temper once, resulting in her being late to a date, and that apparently makes him Satan. WTF? Charlotte goes from a fairly nice fun girl, to a complete bitch in one click of a button. I won't even mention the actual ending, MC is gonna retire for life off the lawsuit he's gonna win off suing the school, the Doctor, and the second keyholder. It's really obvious the ending was phoned in and minimal effort.