[Gin and Hijikata] You Who Cannot Be Marked (Gintama ABO Fanfiction)

Gintama original setting + ABO. Alpha Sakata Gintoki/Beta Hijikata Toshiro. A wholesome, everyday story.

An alien species called Ambrosia invades O-Edo, throwing the hormones of all the city's Alphas and Omegas into chaos.

After an accident, Gintoki starts down the path of pretending to be an Omega while actually being an Alpha.

Theme: I can't mark you forever.