My Friend's Sister Is Scary but Nice

Synopsis

Satomi Yuuki, a first-year high school student, has a secret worry.
It’s that… his friend’s older sister—whom he often visits—is terrifying!
With her flashy hair, multiple piercings, and that intimidating glare every time their eyes meet,
Yuuki spends his days quietly scared… but it turns out, she has an unexpected hidden side…?