Overseas (Markimash fanfic)

When Mark finally realizes his love for Yamimash, Yami might just have another announcement for Mark. After making 100% sure that it wasn't treatable Yami tells Mark his secret illness. To make sure Mark moves on and forgets him Yami hatched a plan and made him promise.

Will Mark move on? Will Yami actually die? Will anyone else ever find out about his illness?