Muichiro and Yuichiro

Yuichiro and Muichiro and you are expert thieves. One day you stole a box containing jewels and the police followed you.
Yuichiro: those sons of bitches are more willing to catch us
Muichiro: I know Tsuki honey, did you place the grenade that I gave you?
Yuichiro: love, how long did you program it?

They are going to steal