Legality: Emulators are legal. BIOS/Firmware keys (required to run XCI files) exist in a legal grey zone, but dumping your own Switch’s firmware via a homebrew tool is legal in most jurisdictions.
A new command introduced for this installment, where the protagonist works as a part-time reporter for the local magazine, "Habataki Watcher". Tokimeki-Memorial-Girls-Side-4th-Heart-XCI-Base...
If you have the file. If you have the time. Play it. Legality: Emulators are legal