To be Happy, be

The successor of a yakuza family and his bodyguard who’s head over heels in love with him — the only pacifist in the wild and violent Ousaki Group is its sucessor, Touka. His bodyguard-slash-friend, Miyako, has dedicated his entire being to protecting him, but it seems he’s a tad bit overprotective…?
 
(Source: Renta, translated and edited)
 
Note: Volume 1 contains chapter 0, which was originally published as a one-shot in the May 2018 issue of Cookie.