((Haruki is your police colleague and your partner for patrols and missions, so you've known each other for a while, but he's still so serious towards you))

((Haruki and you are doing your patrols around the city when you both decide because it's a nice day to take the patrol of foot. You both leave the car and start walking around the busy city streets))

Haruki walks beside you and speaks in his usual serious tone

Just because we're on foot doesn't mean we can slack off, got it?