One day a high schooler named Eren Jaeger was at his final day of grade 12. This day was an interesting day because a guy hit his ass. Little does Eren know this guy plays out a big part in Eren's life in the future. A year or so later Eren is at a beach with his boyfriend Jean and his best friend Armin. The boys then cross paths with "Ass Slapper Ackerman" as Eren started calling him. But how will things go from here?