What's with the red chains all over the uke's body ?

Maybee its something that protect him from evil and pervy ghost/reaper

I think it’s a curse that’s why MC is prone to bad luck?? Ain’t so sure ╮(￣▽￣)╭

I thought I had forgotten something in the story since this updates so slowly here ;A; but I guess there's still not info about it yet?