Shadows of Progakko

Adam Samishi went to live at Progakko, a huge school with the purpose of protecting teenagers from a threat that occurs in the country, however, nobody knows what exactly this threat is.

Note:
This game was originally released on Gamejolt, then re-released on Itch.io a few months later.
At the time the developer was known as SlothOgami/ShinOgami, only later it became Kuraishimi.