It's not a big deal, but his whole life changed since Fushimis arrival.

The boy is as easy to read as everyone else but he's not as negligible.

One day, Blue and Red meet and when the dance starts, Munakata sees his own delight in the ray of Fushimis sword. He notices the red haired kid, Fushimi's focused on but then Suoh appeares and razes every logical thought on Munakas mind.

Later he thinks it through and he decides to possess Fushimi.

He can't afford to break Seri, no. She's too good, but Fushimi isn't and Munakata needs to own now.

That's what they live for.

To possess and to be possessed.