Smoky B.B.
Summary
Kuhou Komado tries to scout Haimura Enjirou to the baseball club in Benten high school after hearing that he led Toyosawa to be runner-up in only one year and then suddenly disappearing like a smoke. But he has no time for baseball as he have 100 million yen debt. Benten is in dire situation that makes Kuhou Komado agrees to paying his debt in exchange for playing for them.
Base Ball manga you may also like:
+ Diamond no Ace
+ Diamond no Ace - Act 2












In a system like that there would need to be rigorous documentation and certificates of prior ownership/guardianship or else anyone and everyone would just get grabbed off the street and enslaved at any time, and such a society would collapse instantly. So these slavers wouldn't have such documentation unless it was a forgery since the kids were just kidnapped; both offenses should be very serious capitol crimes. Once again, the day is saved by glorious Bureaucracy! (and the MC's knowledge and exploitation there of).