Vol.1 https://bato.to/title/151036-okane-ariki-no-kankei-desuga
Half a year ago, Yanai Makoto, a normal office employee, became his friend’s guarantor for a large loan, but in the end the friend fled and left him with enormous debt of 30 million yen. Yanai became a call boy in order to pay off the debt, until one day he stumbled across a yakuza who claimed "love at first sight" and was willing to pay 5 times his price if Yanai became his personal whore…
「全部、俺のもの」友人の借金を肩代わりし、男娼になった柳井真はお客だったヤクザの牧と恋人になり、借金完済の言葉に釣られ極道の世界に飛び込んだ。未知の界隈で働き始め早2ヵ月、仕事内容は組長秘書にお嬢のお守りとヤクザらしくはないが、恋人の牧は相変わらず危険と隣り合わせの生活を送っている。真の心配も強まる中、牧はとある人物を護衛することになり――。