This happens in real life, usually loan sharks are gangsters, so they won’t let you go, if person who took money escapes and you are guarantor.
there are legal and illegal loans. legal loans makes you pay in installments monthly or however your contract says. if you dont make payments due date, the sum increases, you go to court and you can be left without your home, car, everything. but that's a very extreme outcome. legal loans will usually measure how much they could give based on your income and financial status.
illegal loans... they don't ask questions. they will give loans to anyone except homeless lol. they can't take anything from you since that would be theft, so the only thing they have is intimidation. they will target everyone close to you to make you pay up. to make matters worse, they will purposefully be nice, give you big cash no strings attached, make you feel relaxed until the interest increases.
How the f*** can someone take loan and you have to pay for it? Only if you guarantee for that person and sign the documents should the consequences go after you. Is this just manga thing or can this happen?