Let's Be Sisters! · The Galactic Sister's Arrival Episode 1 / 2
Yoshizumi's life is turned upside down when Mayuka, an alien princess, arrives on Earth to revive an ancient superweapon to save her home planet. By using a mind-altering device to establish a sibling bond with Yoshizumi, Mayuka enlists his help to unlock the weapon—a girl named Akiho—through "primitive stimulation." After successfully activating the weapon, Yoshizumi finds himself the reluctant big brother to two otherworldly girls.
