I really wish they'd make more Josei anime, because it satisfies in a way no other genre typically does.
Nakatani Miki (who's had a career much more full of live-action roles and working as an animator than doing voice work) plays Hatoko, the woman in question - almost 40, working in a decent but boring job, never married and never close.
the boy she dated in 7th-grade - for three weeks - and gave her first kiss to. He's also listed as being on the organizing committee for her 25th middle-school reunion, which is why she attends - and the reunion itself (and aftermath) is a hoot. I won't spoil the surprise, but to say it takes an interesting turn would be an understatement.
visual conceit chosen to illustrate it). I'll be keeping an eye on subsequent episodes of this series as they become available, and cover them on a case-by-case basis.