Do not chase the "online" mirage. Instead, purchase the digital version from DLsite (search for Rascou). Set up a Windows VM with Japanese locale. Apply the English fan patch. Experience the game as it was meant to be played—not in a browser tab, but on a desktop, with the eerie ticking of a frozen clock in your headphones.
2. Revenge as Justification: Analyzing the "Vengeful Protagonist" Trope gakuen de jikan yo tomare online