A-kun's circumstances. The past of Yariman and Yarichin

Everything is perfect A-kun (Akihisa Shiono). In front of her favorite girlfriend, Nana (Ryoko Kobayashi), she shows only a gentle expression. The only distraction for A-kun, who has lived to live up to the expectations of her surroundings, was the time to hit her saffle Momoe (Rio Uchida) with her propensity.
On the other hand, Ume (Rina Ota) accepted the advice of Hiyama (Tsubasa Tobinaga) and was absorbed in the production of manga. Shiraki (SWAY) suddenly came to the plum blossoms at dawn. The reason is the proposal to plum !?