It's called, "Gian Hain Aap." Those who understand the reference include Gen Zs and even some millennials who watched Doremon as kids. Some people who haven't watched Doremon might ask - what's a ...

Nobita, Gian ... the change, Doraemon and gang needed to return to the past and capture the demons back into the machine. On the way, they have met the real monk and rinrei (a child).