How to read a transaction from a block? Who paid whom?

How to read a transaction from a block? Who paid whom?

I'd like to know how to read a 'transaction', so if we take an example of this transaction (which comes from block #520156) it's easy to spot that 'th' paid 'U8' 0.005BTC and '9E' paid 'Y5' 0.013BTC. but what are what are the 'DD' and the 'vf' for (marked in green)?

Also, why this transaction (..bac192) includes those 2 payments, are those payments related somehow? (shouldn't a transaction have one payment?)

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