In the 19th entry of the hit coming-of-age romance series, a young man finally gets his first girlfriend—but as a virgin, he has no idea how to handle the relationship. He asks his adult childhood friend Wan for advice, and she unexpectedly offers to let him lose his virginity with her. Hoping to hide his inexperience, he practices sex with Wan, including blowjobs, cunnilingus, and even creampies. Only after going all the way does he finally realize the truth: he is in love with Wan.