Tough Gaiden: Oton

(from ebookjapan):

Shizutora is the 14th head of the murderous kobudo "Nada Shinkage Ryu" and father of Keebo. This kind-hearted and solitary master has techniques that can take lives, but also unleashes fists that heal hearts!

The long-awaited manga collection of short stories that tells another story of the masterpiece of fighting manga "Legend of the Highschool Iron Fist: Tough" and "TOUGH" is now available in tankoban format!

"Oniryu," which depicts the "evil" aesthetics of Shizutora's twin brother Oniryu, is also included!