Game Akuyaku Kizoku ni Tensei Shita Ore wa, Chiito Kin'niku de Musou Suru - Vol. 1 Ch. 1

[eromaster]

Meh, good start, but the kidnapper should have been tortured, at least. No matter the cause of revenge, laying hands on a kid...

 

[Psychronia]

I don't think you can say someone is unscathed if they received a backhand from a trained adult.