Gun x Sword: The Journey from Evergreen

Michael Garret and Wendy Garret sitting next to each other

When Michael Garret is kidnapped from his hometown, his little sister, Wendy, goes on a journey to find and rescue him.
From the anime series Gun X Sword

Overlord: Sixth Floor Guardians

Aura Bella Fiora and Mare Bello Fiore are overjoyed

Aura Bella Fiora (in red) and her younger twin brother, Mare Bello Fiore (in blue), are powerful dark elves who serve their master, Momonga, with unswerving loyalty.
From the anime series Overlord

Marvel’s Jessica Jones: The Upstairs Neighbors

Robyn and Ruben staring out from a partially opened door

Fraternal twins Robyn and Ruben live together in a New York City apartment building, sometimes baking banana bread but mostly arguing loudly.
From the Netflix series Marvel’s Jessica Jones

Big Order: Tell Me A Story

Sena Hoshimiya and Eiji Hoshimiya as children reading a manga together in bed

As a child, Eiji Hoshimiya was inspired by a manga to take over the world so that his little sister, Sena, could be safe.
From the anime series Big Order

Mahouka Koukou no Rettousei: True Genius

Miyuki Shiba and Tatsuya Shiba faintly smiling

Tatsuya Shiba is labeled and treated as an underachieving “weed” at his prestigious school because he failed a standardized test. His younger sister, Miyuki, who is greatly respected due to her scoring top marks on the same test, knows that he’s extremely talented in other areas and supports him privately and publicly.
From the anime series Mahouka Koukou no Rettousei (The Irregular at Magic High School)

Shinmai Maou no Testament: Thou Shalt Be Happy

Basara Tojo, Mio Naruse, and Maria Naruse standing outside in front of a building

When his dad suddenly remarries, Basara Tojo finds himself with two younger step-sisters, Mio Naruse (red hair) and Maria Naruse (white hair), who happen to be actual demons.
From the anime series Shinmai Maou no Testament (The Testament of Sister New Devil)

Watashi ga Motenai no wa Dou Kangaetemo Omaera ga Warui!: Meh

Tomoki Kuroki looks back at Tomoko Kuroki who is reaching out to him

Tomoko Kuroki and her little brother, Tomoki, annoy each other. To him, she’s weird and selfish; to her, he’s frustratingly better at doing things than she is.
From the anime series Watashi ga Motenai no wa Dou Kangaetemo Omaera ga Warui! (No Matter How I Look at It, It’s You Guys’ Fault I’m Not Popular!)