the day of, same day

I buy tickets.

私は券を買います

I buy two tickets.

私は券を2枚買います

I buy two tickets in front of the cinema.

私は映画館の前で券を2枚買います

I buy two tickets in front of the cinema with my friend.

私は友達と映画館の前で券を2枚買います

I buy two tickets in front of the cinema with my friend on the day.

私は当日友達と映画館の前で券を2枚買います