Cool demo, I very much enjoyed what's there so far. For anyone interested all of the (current) content can be played through in about 15 minutes. A good number of "bad end" themed tfs and a straight forward plot with some simple fetch quest/puzzle content. Absolutely worth a play.
Edit: My save file in game time is about 15 min, only after posting this did I consider that there's probably another 5-10 of lost time from bad ends (and one good end). So probably like 30 min run time.
Some bugs I noticed
1) the "bag event" can be repeated for infinite yellow pens
2) the girl who broke her phone freezes after the tf if you talker to her from the left side. However the scene plays out normally if you talk to her from the right or below.
3) After defeating the teacher nothing happens and the two of you are stuck there staring at each other. (Not sure if bug or just content missing from the demo)
I'm very excited to see where this goes. Definitely going to bookmark this and check for future updates.