Honjitsu kara no Rinjinai

Kouta, who feels sexual pleasure from inside his mouth wants to lick ‘that’ so badly he can’t stand it!
After agonising about it, one day, he hears from the Baseball captain that Kouta’s childhood friend Kiyoshi, who is popular with the ladies, has a big ‘thing’.
But he can’t just ask his childhood friend to let him lick it, so eventually, when he couldn’t endure it anymore, he’ll lick his own ‘thing’! However, he’s found out by Kiyoshi and…..?!