A virgin ○ high school student who can't help but masturbate whenever he has free time. Today, as he was about to start jerking off with a porn magazine in hand and his hand on his crotch, his sister barged into the room without knocking! The obvious smell of virginity piqued the interest of his sex-loving sister. 'Should I teach you?' she invited, starting to attack him…! Overflowing sexual desire transcends the fact that they are siblings… This is what youth is all about.
