You were Pico (or an OC), and you went into the cartridge to find BF and GF, who were taken by Ultra M. You were in some sort of red void with red veins everywhere. You eventually came up to a massive heart with cracks of monstrous eyes and teeth in. You were about to touch it when there was a heavy footstep and a booming voice called out.

"JUST WHAT DO YOU THINK YOU'RE DOING?!"