Ep. 6: Kotoko's health crisis forces Irie to skip his Tokyo University entrance exam on Valentine's Day.
Aired on May 8, 2008

With Valentine's Day approaching, Irie's mother assists Kotoko in preparing homemade chocolate, but she fails to deliver them. Naoki proceeds to take the entrance exam for Tokyo University while Kotoko travels to the venue to accompany him. The situation deteriorates when Kotoko's health declines sharply, prompting Irie to abandon his test and rush her to the hospital. Feeling responsible for jeopardizing Irie's academic prospects, Kotoko attempts to leave the Irie household. Irie stops her, revealing he intended to attend the same college as her because he finds her interesting. Kotoko decides to remain, but when she offers more chocolate, Irie declines, stating he dislikes sweet foods.
Episodes
- Ep. 2 · Kotoko blackmails Irie with a childhood photo to secure tutoring for the upcoming exam.
- Ep. 3 · Irie reads Kotoko's confession letter during the school sports festival relay race.
- Ep. 4 · Summer Vacation Rescue and Diary Interference
- Ep. 5 · Class F's Winter Battle Crucial Moment
- Ep. 6 · Kotoko's health crisis forces Irie to skip his Tokyo University entrance exam on Valentine's Day.
- Ep. 7 · Naoki chooses school escalator after Tokyo University exam failure, leading to heated class dinner confrontation.
- Ep. 8 · Kotoko struggles to move past her kiss with Irie on her first day of college.
- Ep. 9 · Kotoko struggles in tennis club while Naoki rejects her date with Yuko Matsumoto
- Ep. 10 · Kotoko faces eviction from the Irie household and returns after a medical emergency.