Using the briefcase shield

Akira Shimazaki and Masaya Takanashi conduct their first private bodyguard op under Shimazaki Security to protect blind piano prodigy Ema Morio. Unfortunately, she gets targeted by a masked man using a slingshot that's used to fire steel balls. Takanashi breaks out the briefcase folding shield to block the shots.

Example of:
Luckily, My Shield Will Protect Me