This season's coveted Monday night, 9 p.m., Fuji TV drama slot is filled by "Taisetsu-na Koto wa Subete Kimi ga Oshiete Kureta" ("You Taught Me All the Important Things"), which stars Erika Toda as a high school English teacher.
Natsumi (Toda), who lived in the United States until the end of junior high school, always dreamed of teaching. Popular because of her cheerful, positive attitude, she's also the coach of the girls' basketball club. Her boyfriend, Shuji (Haruma Miura), is just the opposite: serious and thoughtful. They've known each other since high school and plan to marry in three months' time.
The morning the new semester starts, Shuji wakes up to discover a naked young woman next to him in bed. The night before, he had gone to a bar where he got drunk, and now doesn't remember anything. Late for work, he gives this stranger his key and asks her to lock up.