It's a bit freaky, one sided love (from the male, kirishima) that is slowly convincing yoshiro. Mafia is involved, specifically diffrent families of Japan, and so there is blood, fighting and chasing. I actually love this type of romance, where one expresses his love whitout thinking too much about it, a genuine (in this case more obsessive and overprotective kind) love.
Raise wa Tanin ga Ii