A collaboration project between flavors and MM-bin! On their way home from cram school, underage students take on the challenge of an "anal licking interview" in the name of concentration training! They blush and go wild when their humid anus is suddenly sniffed! When their sensitive assholes are licked and prodded with a tongue, their assholes twitch and faint in agony! When a raw dick is inserted into their assholes from behind during anal cunnilingus, their lust-busting pussies not only don't refuse, but they cum over and over again in sex with their contracting anuses exposed! Four horny cram school students beg for creampies one after another! 300 minutes of great satisfaction!