Naofumi's curious about if Vassal heroes can be obedient with a slave seal. So, he tries to convince L'Arc to let him do it to him.

L'Arc yells, "No! No no no. No way!"

Naofumi begs, "Oh c'mon, please?"

"No way Kiddo," L'Arc crosses his arms.

Naofumi uses puppy eyes. It only takes 10 seconds for L'Arc to give in.

He smiles as he applied the ink. L'Arc sighs and braces himself for some pain.

Afterwards, as a test, L'Arc says, "Kid-ow!"

Naofumi smiles happily, "It works!"

L'Arc complains, "That's what you set the settings to?!"

Naofumi smirks, Yup!"

L'Arc now isn't allowed to call Naofumi Kiddo until further notice or until the seal breaks.