Talk:Volume 2, Chapter 13/@comment-3261234-20130905192509/@comment-30764484-20130905235610

So the story, anime and manga, starts on April 1st, 2008. This means the older five were born in 1993, the younger three in 1994, Sumire and Nao in 1996, and Sawako in 1985.

With regards to the second episode showing "15" by all their names, that's the age they will be that year, regardless of whether they've had their birthday yet.

Aside from being how school years are divided, this is in the chorus of Oh My GĪTA!! "Fall in love, since we happened to meet on my fifteenth spring" (excuse the poor wording). Yui's birthday is in November, which means in her 15th spring she was 14. Mio was the only character who was actually 15 at the start of the story, her birthday being in January.

Huh, when looking at their birthdays I discovered Nodoka of all people is actually the youngest of the older girls, her birthday being in December.