Class 1-B

Class 1-B (クラス1-B, Kurasu 1 - B) was the class at Yotsuba University Affiliated Junior High School that Mahiro Oyama was placed into when she started attending middle school as a girl. All of her major friends including Momiji Hozuki, Asahi Ōka, and Miyo Murosaki were in this class as well, having been in it since the start of the school year. The members of this class remained here until they became second year students and subsequently moved to Class 2-B.

Teachers

 * Mari Nishinomiya (Homeroom)
 * Rin Minakata (Health and Physical Education)
 * Yuriko Kitahara (Home Economics)

Female Students

 * Mahiro Oyama
 * Momiji Hozuki
 * Asahi Ōka
 * Miyo Murosaki
 * Nemu Fujimi
 * Satsuki Tadaka
 * Minori Shiina
 * Mai Yasaka
 * Miyako Nagase
 * Nodoka Fushimi
 * Aoi Tachikawa
 * Akira Nakai
 * Misao Nogata

Male Students

 * Yuta Sakurada
 * Minato Senkawa
 * Takeshi Haijima
 * Tomoya Kiba
 * Makoto Kodaira

Note: There are also numerous other students that appear as unnamed background characters in both the manga and the anime.

Trivia

 * The designation of the class was not revealed in the manga. It was only once the anime started airing that it was confirmed that it was indeed Class 1-B.

Manga

 * Mahiro's First Day
 * Miyo's Refusal
 * Momiji's Nickname
 * Mahiro's Difficult Class
 * Mahiro and Conversation
 * Mahiro's Lunch
 * Mihari's Lunch
 * Mahiro's Final Exams
 * Mahiro's Touch
 * Mahiro the Patissier
 * Asahi and Momiji
 * Mahiro and the Allure of Bare Legs
 * Mahiro and the Mystery Brew
 * Mahiro on Valentine's Day
 * Mahiro and the Homemade Chocolate
 * Mahiro's "Something"
 * Mahiro and the Guidance of the Stars
 * Mahiro's Surprise Party
 * Mahiro Pretties Up

Anime

 * Mahiro Goes Back to Middle School
 * Mahiro's Role-Playing Game
 * Mahiro Ponders Boobs and Identity
 * Mahiro Pretties Up