The Prizer

Nakaro Atsumi, a college student who lost his income after his father died.
With no intention of working, he decides to live as a "Prizer", a bounty hunter who aims for prize money
from magazine sweepstakes, art exhibitions, horse racing, karaoke competitions, and costume contests.
He starts living with Vicky (Mitsuko), an Englishwoman who lives in Japan, trying to support her with "prize money".