She's been regularly training for the marathon with Kase's help. It does not mean that it takes place after chapter 5 since training is not a one time deal.
Also the doujin takes place in February for Valentine's Day but I believe it's spring for chapter 5.
Yeah, that makes sense too.
Wish the author had just said in the author's note, hah.
last edited at Jun 7, 2013 7:28PM