Teachers Need Sex Education Too

Finally, Go Eun-woo is newly appointed as the school nurse. His job satisfaction is 100%. Stable work, sweet long vacations, and predictable hours. “A handsome, neatly dressed school nurse with a friendly smile.” Both fellow teachers and students alike look at Eun-woo with admiration.
Ah, except for one person. Im Seok-joo, the ethics teacher who seems to be from the Joseon Dynasty.
"What exactly did you teach during sex education? Why are you handing out things like this (condoms)?" "Didn't you think that you'd get complaints from the parents?" "Sexual relations are... a sacred act where a man and a woman unite to conceive life after marriage when they truly love each other."
Im Seok-joo, who preaches premarital chastity, and Go Eun-woo, who pursues maximum desires and free sexual relations, didn't match at all.
Of course, that was until Eun-woo caught Im Seok-joo masturbating in the bathroom.
"Teacher, shall I help you?"