is a Japanese four-panel manga series by Yuiko Tokumi, serialized in Houbunsha's seinen manga magazine Manga Time Kirara since 2013. It has been collected into ten tankōbon volumes. A 12-episode anime television series adaptation by CloverWorks aired between January 7 and March 25, 2018.
Premise
Following an unfortunately timed case of the mumps, middle school student Hana Ichinose ends up missing all of her high school exams. Unable to stay in her hometown, Hana moves into her cousin's apartment building and spends a gap year as a "middle school rōnin", before finally attending high school a year later than planned. The series follows Hana as she spends time with her new friends, Eiko, Kamuri, and Tamate, without letting on that she is a year older than them.
Characters
Main characters
Hana is a shy, modest girl who is good at studying, though not athletic. After catching mumps and missing out on her high school entry exams, she was forced to take a gap year and moved into her cousin's apartment building before attending Hoshio Private Academy as a first year. As a result, she is very self-conscious about her current standing and that she does not have anyone of her old school friends in her company, and is therefore very glad to build up an immediate friendship with Eiko, Kamuri and Tamate. Named after .
Tamate is a bubbly, energetic girl from Hana's class who likes to be friends with everyone she meets. She is notable for her protruding upper-jaw incisors, and likes to be called "Tama", due to her dislike for her full name's association with the word tamatebako. She lives with her two grandmothers and enjoys cooking. Named after .
Kamuri is a childlike girl whose physical development greatly lags behind her actual age. She is an old friend of Eiko from elementary school, whom she adores, and becomes timid around others whenever she is absent. Whenever she is addressed with a sensitive topic, she somehow manages to twitch her hair ribbon as an expression. Her main hobbies are eating and sleeping (the latter of which is perhaps the primary reason for her belated development), although she is an extremely fast runner at sports. Her name is derived from kanmuriwashi. Named after .
Eiko is a gentle and level-headed girl with a natural charisma which has made her very popular with her peers without any effort. She likes making accessories, and has a crush on her homeroom teacher Kiyose Enami. Named after .
A resident of the apartment building where Hana and Shion live. After an experience not dissimilar to Hana's led her to miss her university exams, the guilt of lying to her peers caused her to become a shut-in. She soon starts to become more confident after meeting Hana and is one of the few people who knows about her situation. Named after .
Hana's adult cousin and the landlady of a boarding house, where Hana resides for the duration of her high school period. She is pretty and extremely well-endowed, but behaves more like a teenager than an adult woman. Her favorite hobby is taking a close interest in Hana's private life. Named after .
Hana's homeroom teacher, who appears lethargic all the time and uninterested in performing her job. It is because of these traits that she becomes an object of interest for Eiko. She was originally scheduled to play a supporting role, so she is the only main character not named after a unit of numbers.
Classmates
She is the manager of the track and field club.
She is a member of the track and field club and runs a short distance.
She is a member of the gardening club and goes to school early in the morning to take care of the flowerbeds.
She likes Eiko and is stalking her.
Second and third year students
A second year student. Kasane transferred to school in the fall. Kasane was Hana's classmate at the end of her third year of junior high school. When Kasane reunited with Hana, Hana's gap year became known to Eiko, Kamuri and Tamate. Named after .
A second year student and the vice-president of the student council. She often strives to become reliable to Hana, unaware that they are the same age. Named after .
A third year student and the student council president. She has a weak constitution as a result of constantly neglecting her health and is often helped out by Tsuzuru. Named after .
Family members
Hazuki's father, Hana and Shion's grandfather. His first name is unknown.
Hana's mother. Her maiden name is Kyōzuka.
Hana's father. He is two years younger than Hazuki.