Hallelujah Baby

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 successor, Touka. His bodyguard-slash-friend, Miyako, has dedicated his entire being to protecting him, but it seems he's a tad bit overprotective...?

(Source: Shueisha, translated)