What happened to Oguri Shun's left chest?!

Question: What happened to Oguri Shun's left chest!?

He has pectus excavatus, you can look it up on wikipedia!.

*Posted because Shun deserves a proper answer!Www@Enter-QA@Com

Answers:

He doesn't have it, does he!? I never noticed!.Www@Enter-QA@Com

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