It turns out Eren is allergic to Bermudagrass

It turns out Eren is allergic to Bermudagrass.

This may have been what caused his contact dermatitis as he used to crawl and roll around on this grass in short sleeved shirts.

My bermudagrass lawn.

https://www.methylated.net/2013/09/21/my-bermudagrass-lawn/

^