From Bakeneko Scanlations: 4j3c65
Tattoo artist Hyakkei received an unusual request—
His childhood friend, Kaoru, next in line to succeed his yakuza clan, asks him to tattoo a dragon on his back. Kaoru, who hasn’t changed since that time many years ago, is still as strong-willed. With skin of pure white, he warmly shook Hyakkei’s heart. The memory of their summer as 18 year-olds reawaken at their reunion. Tattooist x Yakuza pure love story! Includes the previously unreleased sequel.
1 Volume (Complete)

That is: "yamanashi ochinashi iminashi" (no climax, no point, no meaning). The same thing could have easily been accomplished in a oneshot, I don't know why an entire manga was spent on this story. Every chapter is the same, with no progress. Totally average. The art is almost good, but some of the angles are just wrong in a way that makes it hard to enjoy.
... Last updated 7 years ago