This mode is a reference to Galo Sengen, a meme and a pun of Super Saiyans and the style of Gyaruo combined; it is also based on a music video of the same name. Press G to activate this mode. It cannot be deactivated until the game is reset or the day ends. Once pressed, Yandere-chan will have tanned skin, gold bracelets, sunglasses and Super Saiyan hair.
A remixed version of the song GAL男宣言 will play the entire time.
Galo Mode is mostly cosmetic, but the player has a special ability in this mode. If the player presses the Left Control key, they will "power up" and charge their energy like a Super Saiyan. The player's reputation will be affected if any student sees Yandere-chan powering up, and it will be an automatic Game Over if a teacher or Senpai witnesses the player.
- If the player puts on gloves and then takes them off, Yandere-chan's skin will not be tanned.
- Galo Mode was implemented in the May 3rd, 2015 Build.
- Press D to disable the copyrighted music.
- The game's warning referred to this mode, saying that this game contained "fake tans". This warning was later removed because YandereDev said that it was "cringey".