A underswap Sans x hybrid! Female Reader 68 years before the Human Monster War, lived a Phoenix monster, who had a relationship with a human, and giving birth to a hybrid child. The Phoenix hybrid was an impossible, expectably since the Phoenix monster had one thing about her; she was called The Phoenix Queen. The queen named the hybrid Y/n. 18 years later, the Human Monster war ended, and most humans has assumed that the monsters took the hybrid children, or they were killed. Though, the truth is far different than anyone could imagine. 4 monsters took over the island, made it invisible on the maps, and wanted to experiment on the hybrids. 50 years had passed and the hybrids can't stand another second. They had to end the 4 monster's dictatorship. Maybe the help of two monsters and a determined child could help them?