Death Note: Study Session

Light Yagami helps Sayu Yagami study at a desk while Ryuk the shinigami relaxes on a bed in the background

When Light Yagami isn’t committing mass murder using a supernatural notebook, he’s a hardworking student who often helps his little sister, Saya, with her homework.
From the anime series Death Note

Occultic;Nine: Light the Candles

Aria Kurenaino performs an occultic ritual with candles and incense on a bedroom floor as Takaharu Kurenaino watches while sitting on a bed

Takaharu Kurenaino provides emotional support for his little sister, Aria, even when the circumstances are strange and unsettling to most people.
From the anime series Occultic;Nine

Soukou no Strain: At Odds

Sara Werec in her school uniform standing back-to-back with Ralph Werec in his military uniform

What happened to respected ace pilot Ralph Werec? His little sister, Sara, follows in his footsteps and joins the military in order to find out.
From the anime series Soukou no Strain (Strain: Strategic Armored Infantry)