This set of ROM cartridge + laser disc/VHD was not retailed but were used with arcade machines with built in MSX, such as Victor HC-7 / Pioneer PX-7/ Pioneer PX-V60 / dedicated The Yakyuuken console, and special buttons. One of the featured actresses was born in 1979 and legally all actresses had to be 18+ years old therefore the game series must have continued at least until 1997 to be one of the last professional MSX games.
Details: http://ikasuke.jpn.org/yakyuken/ https://cho.sexy/modules/pico/the_yakyuuken/ (playable online)
