No Money(2007)

Yukiya Ayase is a gentle, kindhearted, and innocent university student. The only relative he has left, his cousin Tetsuo, betrays Ayase with hopes of making an enormous profit to be able to pay off his debts. Somuku Kanou, a bad-tempered (though very rich) loan shark, comes to Ayase's rescue. Kanou apparently knows Ayase from something that happened between them in the past, but Ayase cannot remember who Kanou is, nor does he understand why he "saved" him. Love soon begins to grow between them.